Patent Explorer
Browse, filter, and analyze 3 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2865247A | Compound photometric device | PHOTO RES CORP | Expired / Lapsed | 1955-10-10 | 1958-12-23 | 1975-10-10 | 0.0 yrs | 0 | |
| US2755428A | Regulated d. c. power supply | PHOTO RES CORP | Expired / Lapsed | 1954-09-20 | 1956-07-17 | 1974-09-20 | 0.0 yrs | 0 | |
| US2579661A | Light measuring meter | PHOTO RES CORP | Expired / Lapsed | 1949-04-28 | 1951-12-25 | 1969-04-28 | 0.0 yrs | 0 |