Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9956880 | Variable resistance serial hybrid electric bicycle | Richard Kronfeld, Russell Bockin, Steve Castellotti | 2018-05-01 |
| 9505310 | Variable resistance serial hybrid electric bicycle | Richard Kronfeld, Russell Bockin, Steve Castellotti | 2016-11-29 |