Issued Patents All Time
Showing 1–25 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12379324 | Defect inspection system | — | 2025-08-05 |
| 12313367 | Adjustable gas block with front adjustment access for firearm direct-impingement gas system | — | 2025-05-27 |
| 11279489 | Lie-flat passenger seat configurations for transportation | — | 2022-03-22 |
| 10992112 | Fouling resistant spark plugs | Ronald P. Rohrbach, Peter D. Unger, Jeffrey T. Boehler | 2021-04-27 |
| 10354782 | Composition for and method of making an insulator for a spark plug | Danny R. Overton | 2019-07-16 |
| 10323891 | Extremely short buffer system and bolt carrier design for firearms | — | 2019-06-18 |
| 10186846 | System and method for testing breakdown voltage/dielectric strength of spark plug insulators | Corey Eiden, Matthew B. Below | 2019-01-22 |
| 10101104 | Adjustable gas system for firearms | — | 2018-10-16 |
| 9735553 | System and method for testing breakdown voltage/dielectric strength of spark plug insulators | Corey Eiden, Matthew B. Below | 2017-08-15 |
| 9548591 | Spark plug insulator having an anti-fouling coating and methods for minimizing fouling | Jeffrey T. Boehler, Prabhu Megharaj, Philip P. Treier | 2017-01-17 |
| 9459440 | Linear power adjustment mechanism for telescopic sights for firearms | — | 2016-10-04 |
| 9372040 | Magazine shell of a universal magazine of multiple caliber compatibility for firearms | — | 2016-06-21 |
| 9350143 | Anti-fouling spark plug and method of making | Peter D. Unger, Ronald P. Rohrbach, Jeffrey T. Boehler | 2016-05-24 |
| 9337627 | Method of applying a coating to a spark plug insulator | Prabhu Megharaj, Jeffrey T. Boehler | 2016-05-10 |
| 9178336 | Spark plug | Jeffrey T. Boehler | 2015-11-03 |
| D725990 | Hinge | — | 2015-04-07 |
| 8981632 | Anti-fouling spark plug and method of making | Peter D. Unger, Ronald P. Rohrbach, Jeffrey T. Boehler | 2015-03-17 |
| 8970096 | Anti-fouling spark plug and method of making | Peter D. Unger, Ron Rohrbach, Jeff Boehler | 2015-03-03 |
| 8963406 | Spark plug | Jeffrey T. Boehler | 2015-02-24 |
| 8850732 | Magazine shell of a universal magazine of multiple caliber compatibility for firearms | — | 2014-10-07 |
| 8746126 | Annular piston system for rifles | — | 2014-06-10 |
| 8745911 | Bolt assembly and bolt carrier assembly with switch mechanism for discharging spent casing from either side of firearm receiver without need of disassembling the firearm | — | 2014-06-10 |
| 8729784 | Fouling resistant spark plug | Ronald P. Rohrbach, Peter D. Unger, Jeffrey T. Boehler | 2014-05-20 |
| 8667724 | Self-levering follower for a universal magazine of multiple caliber compatibility for firearms | — | 2014-03-11 |
| 8558439 | Anti-fouling spark plug and method of making | Peter D. Unger, Ron Rohrbach, Jeff Boehler | 2013-10-15 |