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Justin Leach, Esq.

Of Counsel

direct: 408.827.3307  main: 773.570.3330  fax: 773.570.3328  


Practice Groups & Technologies: Licensing; Patent Prep & ProsecutionPatent Counseling & Post-GrantTrademarks & Unfair CompetitionComputers, Software, & Business Methods; Electronics, Semiconductors, & OpticsMechanical Devices; Medical Devices


Office: San Jose


Justin Leach has over 14 years experience in intellectual property (IP) practices, including patent and trademark rights procurement and related IP asset management, enforcement, and defense. His principal focus has been in the preparation and prosecution of patent applications in a wide array of technology areas.


Trusted with high value patent portfolios by companies in the Fortune 50 and 500, Mr. Leach has a thorough understanding of U.S. and PCT patenting  processes, and proven track record of meeting time-sensitive deadlines, while exceeding client expectations. While his practice has predominately focused on multinational companies operating in the field of aerospace and microelectronics, Mr. Leach also enjoys advising smaller companies in developing IP portfolios and assisting with innovative product design.


Prior to joining Klintworth & Rozenblat IP, Mr. Leach was a partner at the law firm of Lorenz & Kopf (formerly Ingrassia, Fisher & Lorenz).



Mr. Leach has represented a wide variety of clients, including Fortune 100 and 500 companies, small to midsize businesses and individual inventors. Selected representations include:

■ Representing a leading manufacture of aircraft components and systems including gas turbine engine components (compressors, casing treatments, shrouds, combustors, turbines, vanes, and blades), avionic display systems, high temperature sensors and actuators, cabin outflow valves and various other airborne valves, pressure regulating systems, fuel metering systems, superalloy compositions, and high temperature coating systems.

■ Representing a leading manufacture of spacecraft components and systems including reaction wheel arrays, control moment gyroscopes, launch equipment, optical devices, satellite design, and isolation devices.

■ Representing a leading manufacture of microelectronics engaged in semiconductor and MEMS fabrication, packaging, and integration into larger electronic systems, including systems having radio frequency communication capabilities.

■ Representing a leading manufacture of specialty materials including wear resistant and inorganic high temperature materials, as well as high temperature electromagnetic devices containing such materials.

■ Representing a leading manufacture of motor vehicles including battery charging systems, vibrational isolation devices, engine components, user graphical interfaces, and vehicular heating and cooling systems.

■ Representing a leading manufacture of defense technologies and munitions, including smart munitions equipped with multimodal seeker devices.

■ Representing a client on the cutting edge of water purification through the usage of ultraviolet treatment and electrocoagulation technologies.

■ Representing a leading manufacture of chemical processing equipment, including various reactor vessels and components, hydrocracking systems, and other systems for processing hydrocarbons.

■ Representing a leading manufacturer of medical devices including stents, implantable cardio defibrillators, catheters, deep brain stimulation devices, and other implantable medical devices.

■ Representing a leading manufacturer of work vehicles and related equipment serving the construction, forestry, and agricultural industries.

■ Representing a leading provider of satellite communication solutions, mesh networks, and Internet solutions including adaptive streaming technologies and video streaming platforms, including over-the-top television content.


 Indiana University Maurer School of Law,  J.D., 2005 

■ Arizona State University, B.S., 2002 


■ Lorenz & Kopf (formerly Ingrassia, Fisher & Lorenz)


■ Admitted to practice before the Supreme Court of Arizona

■ Registered Patent Attorney before the U.S. Patent and Trademark Office

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