| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 18 | |
| #2 | Canada | 8 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Electrical machinery and energy | |
| #4 | Packaging and shipping |
| # | Name | Total Patents |
|---|---|---|
| #1 | Martin Carlson | 11 |
| #2 | Carlson Martin | 7 |
| #3 | Wikkerink Lance A | 2 |
| #4 | Dettman Gerald H | 2 |
| #5 | Lance Wikkerink | 1 |
| #6 | Bruhnke Edward G | 1 |
| #7 | Martin Carison | 1 |
| #8 | Shean Bertram M | 1 |
| #9 | Michaelsen Otto D | 1 |
| #10 | Logan George H | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2951921A | Mat type floor switch | |
| US2972788A | Swinging door support | |
| US2954446A | Mat type floor switch | |
| US2972778A | Mat mold having a special insert | |
| US2910741A | Safety device for swinging doors | |
| US2933755A | Door control device | |
| US2789814A | Power actuating means for swinging door | |
| US2752627A | Pivotal door check device | |
| US2739808A | Automatic door operator | |
| US2770004A | Door closer mechanism | |
| US2700175A | Door closer mechanism | |
| US2598926A | Door check mechanism | |
| US2585625A | Door check mechanism | |
| US2544253A | Door closer mechanism | |
| US2544252A | Door closer | |
| US2553810A | Fluid control device | |
| US2595187A | Adjustable door support | |
| US2603818A | Door check mechanism | |
| CA612696A | Break-away door stop | |
| CA616294A | Door check device |