| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 48 | |
| #2 | Canada | 7 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Optics | |
| #3 | Chemical engineering | |
| #4 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Machines for making railways | |
| #2 | Separation | |
| #3 | Optical systems | |
| #4 | Office furniture |
| # | Name | Total Patents |
|---|---|---|
| #1 | Sponenburg Hiram H | 16 |
| #2 | Scott John M | 14 |
| #3 | Laas Edward | 6 |
| #4 | Smith Edgar M | 5 |
| #5 | Walker William A | 3 |
| #6 | Hanson Louis | 3 |
| #7 | Truman Percival H | 2 |
| #8 | Downey Richard F | 1 |
| #9 | Stevens Arthur L | 1 |
| #10 | Bodkin John A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2121566A | High intensity reflector | |
| US1357360A | Rail-anchor | |
| US1347595A | Rail-anchor | |
| US1262214A | Rail-anchor. | |
| US1228613A | Rail-stay. | |
| US1215426A | Anticreeper. | |
| US1228614A | Rail-anchor. | |
| US1227804A | Anticreeper. | |
| US1214689A | Anticreeper. | |
| US1205359A | Rail-anchor. | |
| US1203067A | Rail-anchor. | |
| US1214723A | Rail-stay. | |
| US1205404A | Anticreeper. | |
| US1177731A | Rail-anchor. | |
| US1170500A | Rail-anchor. | |
| US1209047A | Rail-anchor. | |
| US1123610A | Rail-anchor. | |
| US1170940A | Rail-anchor. | |
| US1123557A | Rail-anchor. | |
| US1143077A | Rail-anchor. |