| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 19 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Furniture and games | |
| #3 | Control | |
| #4 | Machines | |
| #5 | Measurement | |
| #6 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Special information storage | |
| #2 | Domestic washing | |
| #3 | Coin-freed | |
| #4 | Unspecified technologies | |
| #5 | Non-positive-displacement pumps | |
| #6 | Weighing | |
| #7 | Advertising | |
| #8 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Rosenfield William W | 21 |
| Publication | Filing date | Title |
|---|---|---|
| US1348585A | Suction-cleaner | |
| US1286115A | Suction-cleaner. | |
| US1300196A | Suction-cleaner. | |
| US1253535A | Suction-cleaner. | |
| US1296121A | Suction-cleaner. | |
| US1233707A | Rotary fan. | |
| US936362A | Weighing-machine. | |
| US985454A | Motor. | |
| US859114A | Automatic phonograph. | |
| US849086A | Phonograph. | |
| US1049535A | Weighing-machine. | |
| US918915A | Starting and stopping device for phonographs. | |
| US831895A | Phonograph. | |
| US831630A | Phonograph. | |
| US796358A | Coin-controlled strength-testing machine. | |
| US728619A | Vending-machine. | |
| US743931A | Coin-controlled machine. | |
| US743930A | Picture-exhibiting machine. | |
| CA27139A | Portable disinfecting apparatus | |
| CA17612A | Apparatus for bathing, vaporizing, etc. |