| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Chemical engineering | |
| #4 | Furniture and games | |
| #5 | Thermal processes | |
| #6 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Construction of roads | |
| #2 | Unspecified technologies | |
| #3 | Preparing clay | |
| #4 | Nails | |
| #5 | Kitchen equipment | |
| #6 | Drying solid materials by removing liquid | |
| #7 | Separation | |
| #8 | Office furniture | |
| #9 | Domestic stoves |
| # | Name | Total Patents |
|---|---|---|
| #1 | Martin Madsen | 8 |
| #2 | Peter Madsen | 3 |
| #3 | Ziegler Albert H | 1 |
| #4 | Toms Le Roy M | 1 |
| #5 | Madsen Martin | 1 |
| #6 | Madsen Walter M | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2331488A | Lunch counter stool | |
| US2281777A | Adjustable stroke metering pump | |
| US2211933A | Road making machine | |
| US2069376A | Apparatus for producing mineral aggregate roads | |
| US1987243A | Method and apparatus for producing paving material | |
| US1977074A | Air purifying device | |
| US1764327A | Batch box | |
| US1836261A | Portable asphalt mixing plant | |
| US1703315A | Range | |
| US1715852A | Material drier | |
| US1545675A | Combination waffle stove and gas plate | |
| CA401177A | Road making machine | |
| CA539047A | Asphalt pressure injection system and mechanism for asphalt mixing plants |