Patent Explorer
Browse, filter, and analyze 3 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US3908641A | Electrocardiograph with improved stylus control circuits | Birtcher Corp | Expired / Lapsed | 1974-06-07 | 1975-09-30 | 1994-06-07 | 0.0 yrs | 12 | |
| US2828747A | Gas-blanketed electro-surgical device | Birtcher Corp | Expired / Lapsed | 1952-12-06 | 1958-04-01 | 1972-12-06 | 0.0 yrs | 0 | |
| US2808833A | Gas blanketed clotting instrument | Birtcher Corp | Expired / Lapsed | 1952-12-06 | 1957-10-08 | 1972-12-06 | 0.0 yrs | 0 |