WA Sheaffer Pen Co
WA SheaffeActive Patents
0
Total Holdings
6
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3233275A | Writing implement | Expired / Lapsed | 1963-09-18 | 1966-02-08 | 2 | Details |
| FR1384182A | Porous applicator for writing instrument | Expired / Lapsed | 1963-12-06 | 1965-01-04 | 0 | Details |
| CA489110A | Self-pressuring ink reservoir for ball-pointed writing impl… | Expired / Lapsed | — | 1952-12-23 | 0 | Details |
| US2303373A | Fountain pen | Expired / Lapsed | 1941-11-03 | 1942-12-01 | 0 | Details |
| US2283333A | Fountain pen | Expired / Lapsed | 1941-05-22 | 1942-05-19 | 0 | Details |
| US2241865A | Fountain pen | Expired / Lapsed | 1939-12-28 | 1941-05-13 | 0 | Details |