| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 13 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Machine tools | |
| #4 | Electrical machinery and energy | |
| #5 | Thermal processes | |
| #6 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Doors and windows | |
| #2 | Unspecified technologies | |
| #3 | Tools for connecting or disengaging | |
| #4 | Unspecified technologies | |
| #5 | Air-conditioning | |
| #6 | Roof coverings | |
| #7 | Electric switches | |
| #8 | Gearing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lawson Gottfrid C | 13 |
| #2 | Carl Lindquist | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US2812022A | Venetian blind bottom rail | |
| US2641145A | Reduction drive useful for venetian blinds | |
| US2304934A | Venetian blind tilting device | |
| US2202293A | Venetian blind | |
| US2152068A | Venetian shade | |
| US2111980A | Venetian shade | |
| US2111979A | Venetian shade | |
| US2100648A | Fastener | |
| US2078085A | Air conditioning cabinet | |
| US2051725A | Switch | |
| US1734734A | Wrench | |
| US1506011A | Skylight structure | |
| US1362014A | Pipe-wrench |