Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4277810 | Floppy disc structure with rectangular casing | — | 1981-07-07 |
HH
Hans Helmrich — 1 Patent
Overall (All Time): #4,092,888 of 4,157,543Top 100%
1
Patents All Time