| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 13 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Machine tools | |
| #4 | Electrical machinery and energy | |
| #5 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Clutches and brakes | |
| #3 | Nails | |
| #4 | Gearing | |
| #5 | Shafts | |
| #6 | Punching metal | |
| #7 | Electrically-conductive connections | |
| #8 | Shaping of plastics | |
| #9 | Workshop equipment | |
| #10 | Containers for goods storage |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hallowell Howard T | 13 |
| Publication | Filing date | Title |
|---|---|---|
| US1598438A | Feet for display signs | |
| US1508183A | Lift-truck platform | |
| US1557159A | Clutch | |
| US1379623A | Metal bench-leg | |
| US1167296A | Shaft-collar. | |
| US1153488A | Hollow or socket screw. | |
| US1107607A | Process of making shaft-coupling sleeves. | |
| US1107606A | Shaft-coupling. | |
| US839839A | Apparatus for forming sheet-metal hanger-legs. | |
| US732549A | Pulley. | |
| US710191A | Hanger. | |
| US706819A | Pressed-metal belt-shifter arm. | |
| US671550A | Shaft-hanger. |