National Research Council Canada
National RActive Patents
0
Total Holdings
17
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US5269811A | Primary fluid actuated, secondary fluid propelling system | Expired / Lapsed | 1990-11-26 | 1993-12-14 | 11 | Details |
| US4743870A | Longitudinal mode fiber acoustic waveguide with solid core … | Expired / Lapsed | 1986-09-23 | 1988-05-10 | 7 | Details |
| US4627734A | Three dimensional imaging method and device | Expired / Lapsed | 1986-01-16 | 1986-12-09 | 27 | Details |
| US4477772A | Frequency compensator for a current-comparator capacitance … | Expired / Lapsed | 1982-03-29 | 1984-10-16 | 10 | Details |
| CA1020341A | Verifying device for photogrammetric instrument | Expired / Lapsed | 1975-09-17 | 1977-11-08 | 0 | Details |
| US3872858A | Echoencephalograph | Expired / Lapsed | 1973-08-08 | 1975-03-25 | 17 | Details |
| US3294084A | Potential measuring and display apparatus, especially for e… | Expired / Lapsed | 1964-05-14 | 1966-12-27 | 2 | Details |
| US3249913A | Ultrasonic underwater sound generator | Expired / Lapsed | 1963-05-08 | 1966-05-03 | 2 | Details |
| US3180337A | Vascular everting device | Expired / Lapsed | 1963-04-25 | 1965-04-27 | 2 | Details |
| US3087337A | Direct reading resistance thermometer | Expired / Lapsed | 1958-04-28 | 1963-04-30 | 2 | Details |
| US3040748A | Vascular positioning method and device | Expired / Lapsed | 1959-09-14 | 1962-06-26 | 0 | Details |
| US2973456A | Lamp flasher with daylight-responsive inhibiting means | Expired / Lapsed | 1957-05-06 | 1961-02-28 | 0 | Details |
| US2940452A | Vascular evertor | Expired / Lapsed | 1958-11-07 | 1960-06-14 | 0 | Details |
| US2698383A | Electronic counter | Expired / Lapsed | 1952-06-16 | 1954-12-28 | 0 | Details |
| US2691100A | Electronic counter | Expired / Lapsed | 1950-07-24 | 1954-10-05 | 0 | Details |
| US2645552A | Trace identifier for optical oscillographs | Expired / Lapsed | 1951-09-04 | 1953-07-14 | 0 | Details |
| US2596480A | Directive antenna for microwaves | Expired / Lapsed | 1947-11-20 | 1952-05-13 | 0 | Details |