April Mosby, during 20+ years of Patent Prosecution and Appellate work, has prepared and prosecuted over 400 domestic and international patent applications.  She has drafted over 60 prevailing Appeal Briefs.

Having worked for Fortune 100 companies as in-house and outside counsel, April focuses on delivering valuable work-product protecting the client’s products and services in a timely and cost-efficient manner. Her cases span a wide range of technology areas including: artificial intelligence, software, digital signal processing, mixed signal processing, analog circuit design, security software systems, storage systems, semiconductor processing, cloud computing, converged infrastructures, Internet of Things (IoT) systems, memory, wireless (cellular) communications/ fiber optics, broadband, telecommunication switching systems, medical instruments, power generators, and various mechanical devices and systems.

April brings an insider’s perspective to appellate patent work, having spent five years as a patent attorney working with Administrative Patent Judges at the Patent Trial and Appeal Board of the USPTO (PTAB).  During her PTAB tenure, she drafted over 500 Appellate Decisions.

April has helped clients with Patent Licensing in multiple technology areas including telecommunications, switching systems, standards, and various other electrical and mechanical devices. In particular, she has negotiated and drafted complex licensing agreements including patent and software licenses, patent cross-licenses, patent pool agreements, patent acquisition agreements, and patent sale agreements. 

Prior to joining MKW, and after 20 years as patent counsel at large companies, law firms, and the PTAB, April established an independent patent practice in 2017.  Her practice included Patent Prosecution as well as Trademark Prosecution and Appellate work before the Trademark Trial and Appeal Board (TTAB).

Before her patent career, April spent five years as a Member of the Technical Staff / Systems Engineer at AT&T Bell Labs.  As a Bell Labs Systems Engineer, she worked in various technology areas including hardware simulation, switching control systems, and computer security.  While at Bell Labs, she attended law school at night and became an IP District Manager focusing on Software, Telecommunications, and Standards Patent Licensing.



  • Seton Hall Law School J.D., 1996
  • Cornell University M.Engr., Electrical Engineering, 1987
  • Cornell University B.S., Electrical Engineering, 1986

Bar Memberships

  • Admitted in New Jersey, Virginia, and Texas
  • United States Patent and Trademark Office registered


  • “Secrets of A Patent Attorney,” April M. Mosby (2018) [An Inventor’s Guide to Patent Prosecution]