Patent Explorer
Browse, filter, and analyze 15 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2418490A | Distance and direction measuring system | Submarine Signal Co | Expired / Lapsed | 1943-06-15 | 1947-04-08 | 1963-06-15 | 0.0 yrs | 0 | |
| US2407270A | Submarine signaling | Submarine Signal Co | Expired / Lapsed | 1938-09-23 | 1946-09-10 | 1958-09-23 | 0.0 yrs | 0 | |
| US2407271A | Apparatus for submarine signaling | Submarine Signal Co | Expired / Lapsed | 1939-07-22 | 1946-09-10 | 1959-07-22 | 0.0 yrs | 0 | |
| US2399695A | Follow-up system | Submarine Signal Co | Expired / Lapsed | 1940-12-23 | 1946-05-07 | 1960-12-23 | 0.0 yrs | 0 | |
| US2147674A | Apparatus for controlling rotation | Submarine Signal Co | Expired / Lapsed | 1938-03-15 | 1939-02-21 | 1958-03-15 | 0.0 yrs | 0 | |
| US2143035A | Distance measuring apparatus | Submarine Signal Co | Expired / Lapsed | 1935-09-30 | 1939-01-10 | 1955-09-30 | 0.0 yrs | 0 | |
| US2138036A | Compressional wave sender or receiver | Submarine Signal Co | Expired / Lapsed | 1933-09-09 | 1938-11-29 | 1953-09-09 | 0.0 yrs | 0 | |
| US2116522A | Compressional wave sender and receiver | Submarine Signal Co | Expired / Lapsed | 1933-12-05 | 1938-05-10 | 1953-12-05 | 0.0 yrs | 0 | |
| US2088588A | System for geological explorations | Submarine Signal Co | Expired / Lapsed | 1935-07-18 | 1937-08-03 | 1955-07-18 | 0.0 yrs | 0 | |
| US1993326A | Means and method of measuring distance | Submarine Signal Co | Expired / Lapsed | 1930-05-19 | 1935-03-05 | 1950-05-19 | 0.0 yrs | 0 | |
| US1924174A | Means and method of measuring distance | Submarine Signal Co | Expired / Lapsed | 1930-05-19 | 1933-08-29 | 1950-05-19 | 0.0 yrs | 0 | |
| US1924156A | Means and method of measuring distance | Submarine Signal Co | Expired / Lapsed | 1930-05-19 | 1933-08-29 | 1950-05-19 | 0.0 yrs | 0 | |
| US1677945A | Method and apparatus for sound transmission | Submarine Signal Co | Expired / Lapsed | 1924-06-20 | 1928-07-24 | 1944-06-20 | 0.0 yrs | 0 | |
| US1547574A | Apparatus for sounding | Submarine Signal Co | Expired / Lapsed | 1921-05-02 | 1925-07-28 | 1941-05-02 | 0.0 yrs | 0 | |
| US1384014A | Method and apparatus for signaling and otherwise utilizing radiant impulses | Submarine Signal Co | Expired / Lapsed | 1918-01-14 | 1921-07-05 | 1938-01-14 | 0.0 yrs | 0 |