Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11771969 | Liquid damper for a bat knob and/or end cap | — | 2023-10-03 |
| 10252127 | Baseball/softball bat with outer locking system having shock dissipation characteristics | Renqin Zhang, Chi-Hung Lee | 2019-04-09 |
| D832382 | Baseball or softball bat handle smart knob having sensors for analyzing swing characteristics | Renqin Zhang, Chi-Hung Lee | 2018-10-30 |
| 10016667 | Baseball/softball bat with shock dissipation characteristics and method of manufacturing same | Renqin Zhang, Chi-Hung Lee | 2018-07-10 |
| 9220962 | Double wall bat and process for manufacturing same | Chi-Hung Lee, Renqin Zhang | 2015-12-29 |
| 7381141 | Multi-component bat and assembly process | — | 2008-06-03 |
| 7377866 | Multi-component bat having threaded connection and assembly process | — | 2008-05-27 |
| 7344461 | Composite bat with metal sleeve | — | 2008-03-18 |
| 7328599 | Method and apparatus for making metal ball bats | — | 2008-02-12 |