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Donald J. Ersler, S.C.
Patent & Trademark Attorney

Client List — Donald J. Ersler, S.C.

Client List

I have served clients in numerous industries, such as those shown below:

  • Building Products & Construction
  • Medical & Healthcare
  • Sporting Goods
  • Archery
  • Firearm Accessories & Parts
  • Electronic Devices
  • Energy Saving Products
  • Tools
  • Heavy Equipment
  • Safety Devices
  • Motorcycle Accessories
  • Mechanical Inventions
APA Archery
AIRE Supply
Alder Audio
Altapure
American Sewer
Attic Breeze
Black Eagle
Concrete Raising
Critical Room
Dead Foot Arms
Electronic Specialties
Euromaier
Firenock
Goff's Enterprises
Hug Sleep
Lane Industries
Leather Pros
Lee Precision
Mallory Safety & Supply
ModTruss
928 Motorsports
Penguin Data
Plyco Corporation
Pro1tek
Pro Hunter Sights
SAS Forks
Scorpyd Crossbows
Systems Engineering
Thermal Design
Udder Comfort
Watertronics
Whitetail'r

Free Initial Consultation

As your patent agent, Don will quote a flat fee for all legal needs related to obtaining your patent, like invention licensing, so you will know all legal costs before you start. Don works with inventors, design departments, and corporate attorneys in the USA and around the world from his office near Milwaukee, Wisconsin, USA.

Click here for a Free initial patent consultation

We specialize in protecting your patentable ideas. I charge flat fees for most of my work (unlike my competitors), so you will have a reasonable idea of the cost before you start. I also offer prosecution and defense of patent disputes for a fee of $250/hr plus disbursements. Credit cards accepted.