Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4481840 | Layered flywheel with stress reducing construction | Johan A. Friedericy | 1984-11-13 |
| 4458400 | Composite material flywheel hub | Johan A. Friedericy | 1984-07-10 |
| 4286475 | Composite material flywheel hub | Johan A. Friedericy | 1981-09-01 |
| 4186623 | Multi-rim flywheel attachment | Johan A. Friedericy, Dale O. Moeller | 1980-02-05 |