| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Consumer goods | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Ice-boxes | |
| #2 | Punching metal | |
| #3 | Unspecified technologies | |
| #4 | Turning |
| # | Name | Total Patents |
|---|---|---|
| #1 | Vold Lars H | 11 |
| #2 | Hammerstrom Karl R | 4 |
| #3 | Narbert John Burt | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2159187A | Refrigerating system | |
| US1914055A | Automatic cut-out for defrosting devices | |
| US1949518A | Refrigerating system | |
| US1833544A | Defrosting mechanism | |
| US1797739A | Triple-punch mechanism | |
| US1702097A | Air-control mechanism for punching machines | |
| US1633718A | Spacing mechanism for punching machines | |
| US1698326A | Material-moving mechanism for punching machines | |
| US1607709A | Adjustable drill chuck | |
| CA113790A | Turret tool rest | |
| CA356744A | Refrigerating system |