| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 13 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Machines | |
| #3 | Chemical engineering | |
| #4 | Transport | |
| #5 | Basic materials chemistry | |
| #6 | Thermal processes |
| # | Name | Total Patents |
|---|---|---|
| #1 | William Knapp | 13 |
| Publication | Filing date | Title |
|---|---|---|
| US2207408A | Ceiling and wall lighting fixture | |
| US2170201A | Adjustable electric lamp | |
| US2164527A | Lighting fixture hanger | |
| US2091782A | Lamp focusing device for electric fixtures | |
| US1748352A | Ceiling electric-light fixture | |
| US1621417A | Chain brush for stills | |
| US1639189A | Steam-jacketed still | |
| US1601571A | Cooler box | |
| US1595666A | Still-cleaning device | |
| US1401988A | Parking light | |
| US1396439A | Lamp | |
| US1377355A | Vehicle-mirror | |
| US1331569A | Gravity supporting device |