| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 6 | |
| #2 | United States | 6 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Textiles and paper | |
| #2 | Optics | |
| #3 | Engines, pumps and turbines | |
| #4 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Typewriters | |
| #2 | Cameras | |
| #3 | Machines | |
| #4 | Vehicle servicing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Charles Spiro | 6 |
| #2 | Spiro Charles | 6 |
| Publication | Filing date | Title |
|---|---|---|
| US1634803A | Parking device | |
| US1778817A | Steam engine | |
| US1653316A | Silent type-bar action | |
| US1421735A | Reflex camera | |
| US1421736A | Curtain camera shutter | |
| US1398282A | Margin-gage device |