| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 3 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Engines, pumps and turbines | |
| #3 | Thermal processes | |
| #4 | Transport | |
| #5 | Chemical engineering | |
| #6 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Non-positive-displacement pumps | |
| #2 | Unspecified technologies | |
| #3 | Air-conditioning | |
| #4 | Vehicle tyre repairing | |
| #5 | Belts or cables for driving | |
| #6 | Mixing | |
| #7 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Roth Adolph F | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US2127532A | Antiskid device | |
| US2120264A | Stop on strap for antiskid devices and the like | |
| US2046488A | Chain connecter | |
| US1531980A | Centrifugal fan | |
| US1518455A | Centrifugal fan | |
| US1425903A | Closable ventilator | |
| US1409199A | Exhaust fan | |
| US1213955A | Rotary fan. | |
| CA220692A | Rotary fan | |
| CA241209A | Centrifugal fan | |
| CA211191A | Exhaust fan |