Patent Explorer
Browse, filter, and analyze 11 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2848710A | Remote reading fluid pressure gauge | Geophysical Research Corp | Expired / Lapsed | 1954-03-26 | 1958-08-19 | 1974-03-26 | 0.0 yrs | 0 | |
| US2707768A | Geophysical exploration by electrical well logging | Geophysical Research Corp | Expired / Lapsed | 1948-07-02 | 1955-05-03 | 1968-07-02 | 0.0 yrs | 0 | |
| US2605321A | Electrical well logging apparatus | Geophysical Research Corp | Expired / Lapsed | 1951-06-21 | 1952-07-29 | 1971-06-21 | 0.0 yrs | 0 | |
| US2597005A | Method of calibrating microphones | Geophysical Research Corp | Expired / Lapsed | 1944-07-01 | 1952-05-20 | 1964-07-01 | 0.0 yrs | 0 | |
| US2446303A | Well logging apparatus | Geophysical Research Corp | Expired / Lapsed | 1943-11-27 | 1948-08-03 | 1963-11-27 | 0.0 yrs | 0 | |
| US2419852A | Apparatus for measuring the ratio or product of two alternating voltages | Geophysical Research Corp | Expired / Lapsed | 1944-02-19 | 1947-04-29 | 1964-02-19 | 0.0 yrs | 0 | |
| US2321341A | Seismic surveying | Geophysical Research Corp | Expired / Lapsed | 1933-05-26 | 1943-06-08 | 1953-05-26 | 0.0 yrs | 0 | |
| US2257187A | Seismic surveying | Geophysical Research Corp | Expired / Lapsed | 1939-12-21 | 1941-09-30 | 1959-12-21 | 0.0 yrs | 0 | |
| US2192972A | Seismic surveying | Geophysical Research Corp | Expired / Lapsed | 1937-10-21 | 1940-03-12 | 1957-10-21 | 0.0 yrs | 0 | |
| US2018737A | Seismic surveying | Geophysical Research Corp | Expired / Lapsed | 1933-07-21 | 1935-10-29 | 1953-07-21 | 0.0 yrs | 0 | |
| US2003780A | Seismic surveying | Geophysical Research Corp | Expired / Lapsed | 1933-11-24 | 1935-06-04 | 1953-11-24 | 0.0 yrs | 0 |