| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Telecommunications | |
| #3 | Optics | |
| #4 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Electric switches | |
| #2 | Magnets and transformers | |
| #3 | Hand carts | |
| #4 | Broadcast communication | |
| #5 | Photosensitive materials | |
| #6 | Transmission |
| # | Name | Total Patents |
|---|---|---|
| #1 | Carpenter Rupert Evan Howard | 21 |
| #2 | Evan Howard Carpenter Rupert | 11 |
| #3 | Peter Pendleton Eckersley | 1 |
| #4 | Eckersley Peter Pendleton | 1 |
| #5 | Howard Carpenter Rupert Evan | 1 |
| Publication | Filing date | Title |
|---|---|---|
| ES115835A1 | Improvements in the amplifiers for the discharge of electrons. | |
| CA449071A | Electromagnetic device | |
| CA272401A | Electron discharge device | |
| CA311613A | Electron discharge amplifier | |
| CA454076A | Electrical contact assembly | |
| CA296975A | Electro-magnetic device | |
| CA361325A | Wire-broadcasting system |