Zeiss Dropped from Patent Lawsuit But Leupold and Burris Patent Litigation Continues

Leupold & Stevens, Inc. has dropped its lawsuit against Carl Zeiss Optical, Inc. for patent infringement. The lawsuit originally alleged that Zeiss, Burris, and Bushnell infringed Leupold & Stevens’ patent for True Ballistic Range (TBR®) technology. With Zeiss out, the action will proceed against Burris and Bushnell only.

While Zeiss products do allow users to input ballistic groups and display holdover values at specific yardages, it has been determined that they do not incorporate an inclinometer to compensate for uphill/downhill shot angles. Therefore, they do not infringe on US Patent Number 7,654,029 owned by Leupold & Stevens, Inc.

Bushnell Sues Leupold Claiming Infringement of ARC Patents
Leupold’s patent infringement suit will continue against Bushnell and Burris. But Bushnell Inc. has its own patent infringement action against Leupold & Stevens. In February, Bushnell filed suit alleging that Leupold infringed on Bushnell’s U.S. patents for Angle Range Compensation (ARC) and Rain Mode laser-rangefinder technology. Bushnell’s ARC and Leupold’s True Ballistic Range (TBR) are competing technologies. The courts will have to resolve whether both ARC and TBR patents can co-exist.

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Tags: Angle Compensation, Optics, Patent, Zeiss