Patent Explorer
Browse, filter, and analyze 16 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US3851302A | Method and apparatus for seismic data acquisition by sequential sampling of data | Seismograph Service Corp | Expired / Lapsed | 1973-03-09 | 1974-11-26 | 1993-03-09 | 0.0 yrs | 13 | |
| US3303501A | Radio location system with lane identification facilities | Seismograph Service Corp | Expired / Lapsed | 1964-04-22 | 1967-02-07 | 1984-04-22 | 0.0 yrs | 2 | |
| US3271732A | Method and apparatus for correlating seismic disturbances against previously recorded signals | Seismograph Service Corp | Expired / Lapsed | 1963-01-04 | 1966-09-06 | 1983-01-04 | 0.0 yrs | 2 | |
| US3035479A | Analyzing methods employing optical graticules | Seismograph Service Corp | Expired / Lapsed | 1957-04-01 | 1962-05-22 | 1977-04-01 | 0.0 yrs | 0 | |
| US2872676A | Radio location system | Seismograph Service Corp | Expired / Lapsed | 1954-04-23 | 1959-02-03 | 1974-04-23 | 0.0 yrs | 0 | |
| US2855595A | Radio navigation system | Seismograph Service Corp | Expired / Lapsed | 1955-05-26 | 1958-10-07 | 1975-05-26 | 0.0 yrs | 0 | |
| US2843846A | Radio location system | Seismograph Service Corp | Expired / Lapsed | 1954-01-21 | 1958-07-15 | 1974-01-21 | 0.0 yrs | 0 | |
| US2730714A | Radio location system | Seismograph Service Corp | Expired / Lapsed | 1954-04-23 | 1956-01-10 | 1974-04-23 | 0.0 yrs | 0 | |
| US2652558A | Radio location system | Seismograph Service Corp | Expired / Lapsed | 1950-01-12 | 1953-09-15 | 1970-01-12 | 0.0 yrs | 0 | |
| US2652559A | Radio location system | Seismograph Service Corp | Expired / Lapsed | 1950-11-07 | 1953-09-15 | 1970-11-07 | 0.0 yrs | 0 | |
| US2648979A | Transducer testing apparatus | Seismograph Service Corp | Expired / Lapsed | 1946-08-09 | 1953-08-18 | 1966-08-09 | 0.0 yrs | 0 | |
| US2630188A | System and method of generating seismic waves in the earth | Seismograph Service Corp | Expired / Lapsed | 1947-01-11 | 1953-03-03 | 1967-01-11 | 0.0 yrs | 0 | |
| US2578133A | System of seismic recording | Seismograph Service Corp | Expired / Lapsed | 1944-11-08 | 1951-12-11 | 1964-11-08 | 0.0 yrs | 0 | |
| US2513314A | Geophysical prospecting system | Seismograph Service Corp | Expired / Lapsed | 1947-10-09 | 1950-07-04 | 1967-10-09 | 0.0 yrs | 0 | |
| US2513315A | Radio position determining system | Seismograph Service Corp | Expired / Lapsed | 1947-10-09 | 1950-07-04 | 1967-10-09 | 0.0 yrs | 0 | |
| US2493534A | Testing device for seismic signal apparatus | Seismograph Service Corp | Expired / Lapsed | 1947-06-13 | 1950-01-03 | 1967-06-13 | 0.0 yrs | 0 |