Patent Explorer
Browse, filter, and analyze 2 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| GB502978A | Improvements in sheets, windows, lenses and other optical devices and other objects formed of so-called "plastic glass" material | Combined Optical Industries Ltd | Expired / Lapsed | 1937-10-01 | — | 1957-10-01 | 0.0 yrs | 0 | |
| US2314838A | Optical lens and similar device | Combined Optical Industries Ltd | Expired / Lapsed | 1936-06-08 | 1943-03-23 | 1956-06-08 | 0.0 yrs | 0 |