Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7651420 | Injection-molded ball bat | Hsin Feng Lin | 2010-01-26 |
| 7410433 | Bat handle with optimal damping | Douglas G. Guenther, Mark A. Fritzke, Michael D. Eggiman | 2008-08-12 |
| 7207907 | Ball bat having windows | Douglas G. Guenther | 2007-04-24 |
| 7175552 | Ball bat formed of carburized steel | Mark A. Fritzke, Douglas G. Guenther | 2007-02-13 |
| 7097578 | Bat having a flexible handle | Douglas G. Guenther, Mark A. Fritzke, Michael D. Eggiman | 2006-08-29 |
| 6645100 | Sports ball with floating cover | Douglas G. Guenther | 2003-11-11 |
| 6645099 | Moisture-absorbing rubber-covered game ball | Hsin Feng Lin | 2003-11-11 |
| 6413177 | Sports ball with floating cover | Douglas G. Guenther | 2002-07-02 |
| 6123633 | Inflatable game ball with a lobular carcass and a relatively thin cover | Douglas G. Guenther | 2000-09-26 |
| 6024661 | Sweat-absorbing game ball | Douglas G. Guenther | 2000-02-15 |
| 5931752 | Inflatable game ball with laid-in channel or logo | Douglas G. Guenther | 1999-08-03 |
| 5888157 | Football | Douglas G. Guenther | 1999-03-30 |
| 5681233 | Inflatable game ball with sponge rubber carcass | Douglas G. Guenther, San-Fu Yang, Takeo Suzuki | 1997-10-28 |