| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 61 | |
| #2 | Canada | 23 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Furniture and games | |
| #2 | Machines | |
| #3 | Electrical machinery and energy | |
| #4 | Consumer goods | |
| #5 | Materials and metallurgy | |
| #6 | Engines, pumps and turbines | |
| #7 | Mechanical elements | |
| #8 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Domestic washing | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Electrically-conductive connections | |
| #5 | Laundering textiles | |
| #6 | Non-positive-displacement pumps | |
| #7 | Foundry moulding | |
| #8 | Buttons, pins and buckles | |
| #9 | Vehicle wheels | |
| #10 | Shafts |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lang Henry T | 28 |
| #2 | Dunbar Ralph E | 15 |
| #3 | Carson Jesse F | 8 |
| #4 | Rosenfield William W | 6 |
| #5 | Hoff Earl B | 5 |
| #6 | Kroenlein Henry A | 5 |
| #7 | Kirby James B | 4 |
| #8 | Julius Tuteur | 3 |
| #9 | Darst James M | 2 |
| #10 | Otto Brintzenhofe | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US2352947A | Vacuum cleaner fan shaft seal | |
| US2300938A | Vacuum cleaner | |
| US2307538A | Vacuum cleaner | |
| US2327181A | Vacuum cleaner | |
| US2260038A | Coupling | |
| US2258252A | Handle for vacuum cleaners and the like | |
| US2327810A | Vacuum cleaner | |
| US2211603A | Handle for vacuum cleaners and the like | |
| US2249463A | Suction nozzle | |
| US2232548A | Vacuum cleaner | |
| US2282950A | Vacuum cleaner | |
| US2205877A | Surface cleaning tool | |
| US2141307A | Commutator | |
| US2178427A | Suction nozzle | |
| US2207582A | Cleaner for surface coverings | |
| US2099566A | Vacuum cleaner | |
| US2230722A | Vacuum cleaner | |
| US2141268A | Commutator and method of making same | |
| US2097294A | Vacuum cleaner | |
| US2036789A | Suction cleaner tool |