| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Civil engineering | |
| #4 | Consumer goods | |
| #5 | Computer technology | |
| #6 | Thermal processes | |
| #7 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Clutches and brakes | |
| #3 | Bolts for doors or windows | |
| #4 | Hand carts | |
| #5 | Counting mechanisms | |
| #6 | Gearing | |
| #7 | Burners | |
| #8 | Filing and indexing | |
| #9 | Laundering textiles | |
| #10 | Locks |
| # | Name | Total Patents |
|---|---|---|
| #1 | Sponsel Charles W | 13 |
| Publication | Filing date | Title |
|---|---|---|
| US1599595A | Door holder | |
| US1576252A | Motion-converting device | |
| US1622682A | Paper clip | |
| US1383669A | Elevating-truck | |
| US859023A | Clutch. | |
| US870203A | Speed-indicator. | |
| US865956A | Wire clip. | |
| US762664A | Hydrocarbon-burner. | |
| US695005A | Power mechanism. | |
| US741178A | Explosive-engine. | |
| US628366A | Door-holding device. | |
| CA242123A | Paper clip | |
| US870202A | Reversing-gear. |