Patent Explorer
Browse, filter, and analyze 3 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US4333155A | Calculator having a modular keyboard | Monroe Systems for Business Inc | Expired / Lapsed | 1979-05-18 | 1982-06-01 | 1999-05-18 | 0.0 yrs | 12 | |
| US4323979A | Cartridge and bezel assembly for a calculator | Monroe Systems for Business Inc | Expired / Lapsed | 1979-08-20 | 1982-04-06 | 1999-08-20 | 0.0 yrs | 13 | |
| US4017725A | Solar powered portable calculator | Monroe Systems for Business Inc | Expired / Lapsed | 1975-01-03 | 1977-04-12 | 1995-01-03 | 0.0 yrs | 10 |