| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Civil engineering | |
| #3 | Electrical machinery and energy | |
| #4 | Machine tools | |
| #5 | Textiles and paper | |
| #6 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Guiding railway traffic | |
| #2 | Earth drilling | |
| #3 | Mining | |
| #4 | Fibrous raw materials | |
| #5 | Unspecified technologies | |
| #6 | Electric switches | |
| #7 | Accessories for machine tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Thullen Louis H | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US1937300A | Drilling apparatus | |
| US1836998A | Drilling apparatus and the like | |
| US1782128A | Grinding or cutting apparatus | |
| US1712856A | Switch operating and locking device | |
| US1221391A | Feeding device. | |
| US1070638A | Control system for electric motors. | |
| US838916A | Inductive bond. | |
| US807337A | Switch and lock movement and detector-bar. | |
| US837154A | Railway signaling system. | |
| US823648A | Railway signaling. | |
| CA286056A | Cutter |