| 2807012 | Transfusion monitoring device | 1957-09-17 | ||
| 2760184 | System for detecting solids in gaseous streams | 1956-08-21 | ||
| 2757533 | Gas leak detector for well casing | 1956-08-07 | ||
| 2596152 | Oxygen breathing system | 1952-05-13 | ||
| 2431328 | Respiroscope | 1947-11-25 | ||
| 2376971 | Sonant respiration indicator | 1945-05-29 | ||
| 2210417 | Leak detector | 1940-08-06 | ||
| 2153254 | Method and means of measuring fluid flow | 1939-04-04 | ||
| 0820259 | N/A | 1906-05-08 |