| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Electrical machinery and energy | |
| #3 | Civil engineering | |
| #4 | Optics | |
| #5 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wamser Charles J | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US2272733A | Interchangeable illuminated sign | |
| US2237750A | Illuminated display sign | |
| US2163298A | Interchangeable illuminated sign | |
| US2113285A | Interchangeable sign | |
| US2103738A | Illuminated sign | |
| US2097139A | Incandescent lamp | |
| US2104337A | Illuminated sign | |
| US1914932A | Illuminated display sign | |
| US1830414A | Illuminated character for electric signs | |
| US1824452A | Luminescent tube | |
| US1723670A | Gas-tube mounting | |
| US1483920A | Hinged window |