| 1818760 | Process and apparatus for drawing electrical pictures | |||
| 1958406 | Electrical spraying device | |||
| 1966322 | Method and apparatus for photographic printing | |||
| 1966907 | Raised printing process and product | |||
| 1989717 | Method of making rubber articles | |||
| 2221467 | Focusing and separation of charged particles | |||
| 2221776 | Electron photography | |||
| 2224391 | Process of and apparatus for printing | |||
| 2251190 | Method of producing neutrons | |||
| 2281638 | Electron camera | |||
| 2297691 | Electrophotography | |||
| 2302185 | Electrified spray apparatus | |||
| 2357809 | Electrophotographic apparatus |