Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4398491 | Acoustic indicator of vacuum level in containers | Heinz W. Nonnemann, Robert D. Payne, Wesley J. Szpitalak | 1983-08-16 |
| D261868 | Pull tab for a tear strip opener | Gary K. Hasegawa | 1981-11-17 |
| 4244488 | Plastic pull tab with memory | Gary K. Hasegawa, Donald R. Richardson | 1981-01-13 |