| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 6 | |
| #2 | United States | 6 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Thread cutting | |
| #2 | Unspecified technologies | |
| #3 | Turning | |
| #4 | Accessories for machine tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Burgsmuller Karl H | 6 |
| #2 | Heinrich Burgsmuller Karl | 6 |
| #3 | Harz Niedersachsen | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2749807A | Device for cutting long threads | |
| US2849926A | Thread cutting device | |
| US2739510A | Crank driven arrangement | |
| US2691921A | Slant cut | |
| US2713282A | Nibbling cut | |
| US2749808A | Thread chasing | |
| CA537509A | Device for cutting long threads | |
| CA571505A | Method and apparatus for cutting threads | |
| CA559280A | Alternating cut threading method and apparatus | |
| CA510723A | Apparatus for cutting screw threads | |
| CA527824A | Crank drive for rotating thread cutting tools | |
| CA537508A | Thread chasing |