| 2667600 | Television pickup tube | 1954-01-26 | ||
| 2456396 | Control of vaporizable material | 1948-12-14 | ||
| 2311930 | Measuring mercury into fluorescent lamps | 1943-02-23 | ||
| 2284036 | Method and apparatus for exhausting and filling discharge devices | 1942-05-26 | ||
| 1623323 | Method of introducing volatile matter into lamps and the like | 1927-04-05 | ||
| 1009939 | N/A | 1911-11-28 |