Patent Explorer
Browse, filter, and analyze 4 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2554909A | Smudge resistant transfer sheet and process of making same | Ditto Inc | Expired / Lapsed | 1946-04-15 | 1951-05-29 | 1966-04-15 | 0.0 yrs | 0 | |
| US2243078A | Transfer sheet and composition for producing reinkable impressions | Ditto Inc | Expired / Lapsed | 1938-02-04 | 1941-05-27 | 1958-02-04 | 0.0 yrs | 0 | |
| US2165972A | Duplicating machine | Ditto Inc | Expired / Lapsed | 1937-06-28 | 1939-07-11 | 1957-06-28 | 0.0 yrs | 0 | |
| US2071910A | Treating hectograph bands | Ditto Inc | Expired / Lapsed | 1935-12-09 | 1937-02-23 | 1955-12-09 | 0.0 yrs | 0 |