| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 13,601 | |
| #2 | France | 591 | |
| #3 | United Kingdom | 473 | |
| #4 | Canada | 193 | |
| #5 | Germany | 160 | |
| #6 | Spain | 159 | |
| #7 | Austria | 18 | |
| #8 | Switzerland | 8 | |
| #9 | Australia | 6 | |
| #10 | Denmark | 4 | |
| #11 | Belgium | 2 | |
| #12 | Japan | 2 | |
| #13 | Finland | 1 | |
| #14 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Machines | |
| #3 | Measurement | |
| #4 | Transport |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hellmund Rudolf E | 204 |
| #2 | Joseph Slepian | 178 |
| #3 | Fortescue Charles Le G | 161 |
| #4 | Schmidt Henry F | 160 |
| #5 | James Henry D | 144 |
| #6 | Lamme Benjamin G | 124 |
| #7 | Eaton George M | 102 |
| #8 | Conrad Frank | 96 |
| #9 | Gulliksen Finn H | 90 |
| #10 | Storer Norman W | 89 |
| Publication | Filing date | Title |
|---|---|---|
| US2424227A | Synchronous motor control system | |
| US2374031A | Piercing tool | |
| US2367980A | Regulating system | |
| US2374060A | Locomotive control system | |
| US2370051A | Scraper head for wire | |
| US2374013A | Trolley conductor device | |
| US2374199A | Current regulator for electrolytic plants | |
| US2370102A | Pitot-static air-speed indicator | |
| US2363347A | Calibrating tool | |
| US2359175A | Generator control means | |
| US2367983A | Regulating system | |
| US2360189A | Refrigeration apparatus | |
| US2373618A | Refrigeration apparatus | |
| US2368421A | Condenser apparatus | |
| US2363328A | Strap stretching device | |
| US2376766A | Power-reversal and faultresponsive relay | |
| US2367956A | Motor control system | |
| US2367615A | Grid | |
| US2359123A | Control system | |
| US2370854A | Bearing apparatus |