| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Canada | 6 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Engines, pumps and turbines | |
| #3 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Pumps | |
| #3 | Earth drilling |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hoffman Glenn R | 9 |
| #2 | Hoffman Glenn Rufus | 6 |
| #3 | Hoffman Ross J | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US1507285A | Transmission band | |
| US1481098A | Transmission band | |
| US1481097A | Transmission band | |
| US1544755A | Transmission band for automobiles, motor vehicles, and other purposes | |
| US1599235A | Automobile or truck transmission | |
| US1481093A | Transmission band | |
| US1481094A | Transmission band | |
| US1481095A | Transmission band | |
| US1481092A | Transmission band | |
| US809806A | Method of producing oil from oil-wells. | |
| US809805A | System for pumping oil-wells. | |
| CA243346A | Transmission band | |
| CA251328A | Transmission band | |
| CA246003A | Transmission band | |
| CA243349A | Transmission band | |
| CA243348A | Transmission band | |
| CA243347A | Transmission band |