What Does a Patent Attorney Do?

11 min read

What Does a Patent Attorney Do?

A patent attorney is a specialized legal professional who helps inventors protect their inventions through the United States patent system. Unlike general practice attorneys or even other intellectual property lawyers, patent attorneys must meet a unique set of qualifications: they must pass both a state bar exam and the USPTO registration exam (commonly called the “patent bar”), and they must hold a degree in science or engineering.

This combination of legal training and technical expertise is what makes patent attorneys different from every other type of lawyer. It is also why choosing the right patent attorney — one whose technical background matches your invention — can make the difference between a strong patent and a weak one.

Qualifications: What It Takes to Become a Patent Attorney

The path to becoming a patent attorney is demanding. Here is what it requires:

Technical education: The USPTO requires a bachelor’s degree in a qualifying science or engineering field, or equivalent coursework. This ensures that patent attorneys can understand the inventions they are working to protect at a technical level — not just a legal one.

Law degree and state bar admission: Like all attorneys, patent attorneys must earn a JD (Juris Doctor) and pass a state bar exam to practice law.

USPTO registration exam: The patent bar is a separate exam administered by the USPTO. Passing it grants the attorney a registration number and the right to practice before the USPTO — meaning they can file and prosecute patent applications on behalf of inventors. Only registered patent attorneys and patent agents can do this.

Shannon Warren holds a BS in Computer Engineering from Texas A&M University and a JD from South Texas College of Law, and has been registered with the USPTO (Reg. No. 64325) and practicing patent law since 2009, building on an engineering career that started in 2002. That combined experience — more than two decades spanning engineering and law — has resulted in an extensive portfolio of US patents secured across a wide range of technologies.

Core Responsibilities of a Patent Attorney

Prior Art Research and Patentability Assessment

Before investing in a patent application, a patent attorney conducts a thorough search of existing patents, published patent applications, academic literature, and other publicly available information (collectively called “prior art”). The goal is to determine whether your invention is novel and non-obvious — the two key requirements for patentability.

This is not just a database search. An experienced patent attorney knows how to interpret search results in context, identify the most relevant prior art references, and assess how the differences between your invention and the prior art will be viewed by a USPTO examiner. The attorney then provides a patentability opinion — an honest assessment of your chances of getting a patent and how broad that patent might be.

For example, when evaluating the Tool Safety System, the prior art search uncovered several existing safety devices, but the digital tracking component was a novel addition that distinguished the invention from everything else in the field. That distinction became the focus of the patent strategy.

Patent Application Drafting

Drafting a patent application is the most technically demanding and strategically important part of a patent attorney’s work. A patent application is not just a description of your invention — it is a legal document that defines the boundaries of your intellectual property rights.

The specification must describe your invention in enough detail that someone skilled in the relevant field could reproduce it. This is called the “enablement requirement,” and failure to meet it can invalidate your patent. The specification includes background information, a detailed description of the preferred embodiment, alternative embodiments, and explanation of how the invention solves a particular problem.

The claims are the legal heart of the patent. Each claim is a single sentence (often a very long, carefully structured one) that defines a specific aspect of what your patent protects. Writing effective claims requires balancing two competing goals:

  • Breadth: Broader claims cover more variations of your invention and make it harder for competitors to design around your patent.
  • Specificity: Narrower claims are easier to get allowed by the USPTO and harder for challengers to invalidate.

Skilled patent attorneys draft claims at multiple levels of breadth — starting with broad independent claims and working down to narrower dependent claims that capture specific features. This layered approach provides fallback positions if the broadest claims face strong prior art challenges.

The drawings must accurately illustrate every aspect of the invention described in the specification and claims. Patent drawings follow strict USPTO formatting requirements and typically include multiple views, cross-sections, and exploded views for mechanical inventions, or flowcharts and system diagrams for software and process inventions.

When I drafted the application for the Bandsaw Automated Portioning Saw System, the drawings needed to capture both the mechanical cutting components and the visual processing system. My Computer Engineering background allowed me to work fluidly across both domains, producing an application that comprehensively protected the full scope of the invention.

Patent Prosecution

Patent prosecution is the back-and-forth process between your attorney and the USPTO examiner after your application is filed. This is where many patents are won or lost, and it is where an experienced attorney’s skills matter most.

Office action responses: In most cases, the USPTO examiner issues one or more “office actions” — official communications raising rejections or objections to your claims. The examiner might argue that your claims are anticipated by a prior patent, that the combination of known elements would have been obvious, or that your claims are indefinite or lack adequate support in the specification.

Your patent attorney reviews the office action, analyzes the examiner’s reasoning and cited references, and crafts a response. This response might include:

  • Legal arguments explaining why the examiner’s rejection is incorrect
  • Amendments to the claims that narrow their scope to overcome the prior art while still providing meaningful protection
  • Declarations or affidavits providing additional evidence of patentability
  • Interview requests to discuss the issues directly with the examiner

Over more than a decade of patent prosecution, I have responded to hundreds of office actions across every major technology area. The Oilfield Chemical Injection System required careful prosecution to distinguish the invention from existing chemical injection methods used in the oil and gas industry. The Endoscope Instrumentation Drive System involved navigating rejections based on prior medical device patents, requiring detailed technical arguments about the novel drive mechanism.

Examiner interviews: Sometimes the most effective prosecution strategy is a direct conversation with the examiner. Patent attorneys can request interviews (phone calls or video conferences) with the examiner to discuss the invention, explain the distinctions over prior art, and negotiate claim language. These interviews often resolve issues more efficiently than written responses alone.

Appeals: If prosecution reaches an impasse — the examiner maintains rejections that the attorney believes are incorrect — the attorney can file an appeal to the Patent Trial and Appeal Board (PTAB). Appeals involve writing a formal brief, and sometimes presenting oral arguments, before a panel of administrative patent judges.

Strategic Patent Counseling

Beyond the mechanics of filing and prosecution, a patent attorney provides strategic advice that shapes your broader IP approach:

  • Portfolio strategy: For inventors and companies with multiple innovations, a patent attorney helps prioritize which inventions to patent first and how to build a portfolio that covers your market position from multiple angles.
  • Provisional vs. non-provisional filing decisions: Your attorney advises on whether to start with a provisional application or go straight to a non-provisional, based on your timeline, budget, and business goals.
  • Continuation and divisional strategies: If your application covers multiple inventions, or if you want to pursue additional claims after your first patent is granted, your attorney can file continuation or divisional applications to expand your protection.
  • Freedom-to-operate analysis: Before bringing a product to market, your attorney can search existing patents to assess whether your product might infringe someone else’s rights.
  • International filing strategy: If you plan to sell outside the US, your attorney advises on international patent filings, including Patent Cooperation Treaty (PCT) applications and direct national filings.

Technical Expertise Across Industries

Patent attorneys typically develop deep expertise in specific technology areas. Shannon Warren’s practice spans multiple fields, including:

This breadth of technical experience means your patent attorney already understands your industry when you walk in the door, which translates to better applications and more efficient prosecution.

Patent Attorney vs. Patent Agent vs. General Attorney

Understanding the differences helps you choose the right professional:

Patent attorney: Licensed to practice law (bar-admitted) AND registered to practice before the USPTO. Can handle patent applications, prosecution, litigation, contracts, and all legal aspects of intellectual property.

Patent agent: Registered to practice before the USPTO but NOT a licensed attorney. Can prepare and file patent applications and handle prosecution, but cannot provide legal advice outside of patent prosecution, represent you in court, or draft licensing agreements.

General attorney: Licensed to practice law but NOT registered with the USPTO. Cannot file or prosecute patent applications. May handle trademark, copyright, or general business law, but lacks the technical qualifications and USPTO registration required for patent work.

For most inventors, a patent attorney provides the most comprehensive service — combining the ability to prosecute patents with broader legal capabilities like contract review, licensing negotiations, and enforcement strategy.

Frequently Asked Questions

How do I choose the right patent attorney for my invention? Look for three things: (1) USPTO registration, which is non-negotiable; (2) a technical background that matches your invention’s field; and (3) a track record of granted patents in your technology area. A patent attorney with a Computer Engineering degree will be far more effective with a software or electronics invention than one with a chemistry background, and vice versa.

How much does a patent attorney cost? Attorney fees vary based on the complexity of the invention and the scope of services. For a detailed cost breakdown, see our guide on patent costs in Texas.

Can I file a patent without an attorney? Legally, yes — the USPTO allows “pro se” filing. Practically, this is risky. Patent claims are a specialized form of legal writing, and the nuances of claim construction, prosecution strategy, and USPTO rules can trap inexperienced filers. Studies consistently show that applications filed by registered patent attorneys have significantly higher allowance rates than pro se applications.

What is the difference between a patent attorney and an intellectual property attorney? All patent attorneys are intellectual property attorneys, but not all IP attorneys are patent attorneys. Intellectual property law also includes trademarks, copyrights, and trade secrets. Patent law requires specific technical qualifications and USPTO registration that other IP work does not. Shannon Warren is both a patent attorney and an IP attorney, with deep specialization in patent prosecution.

How often will I communicate with my patent attorney during the process? Communication frequency varies by stage. During the initial disclosure and application drafting phase, you may have weekly or biweekly conversations. After filing, communication typically occurs when office actions arrive (usually every few months during examination). A good patent attorney keeps you informed at every stage and explains your options in plain language. For an overview of the full timeline, see our Patent Process Overview.

What should I bring to my first meeting with a patent attorney? Bring everything you have: written descriptions, sketches, diagrams, prototypes (if portable), photos, test results, and any prior art you are aware of. Also bring a clear explanation of what problem your invention solves and what makes your approach different from existing solutions. The more prepared you are, the more productive and efficient the initial consultation will be.

Have an invention to protect? Shannon Warren brings more than a decade of patent prosecution experience, a Computer Engineering background, and an extensive portfolio of granted US patents to every client engagement. With offices in Houston and Amarillo, he serves inventors across Texas and beyond. Contact Shannon Warren to schedule a consultation.

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