Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862651 | Downspout shield | — | 1989-09-05 |
| 4496897 | Variable voltage control for self-excited self-regulated synchronous alternator | Lewis E. Unnewehr, Andrew F. Szippl | 1985-01-29 |
| 4408152 | Single phase, self-regulated alternator | Andrew F. Szippl | 1983-10-04 |
| 4374136 | Pyrimidine derivatives | Jack Hill, Brian William Sharp, Dennis Warburton, by Thomas Walker, administrator | 1983-02-15 |