| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 13 | |
| #2 | Austria | 12 | |
| #3 | Belgium | 6 | |
| #4 | Germany | 6 | |
| #5 | Canada | 3 | |
| #6 | Australia | 1 | |
| #7 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Measurement | |
| #4 | Control | |
| #5 | Civil engineering | |
| #6 | Machine tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Grove Marvin Henry | 28 |
| #2 | Marvin Henry Grove | 10 |
| #3 | Henry Grove Marvin | 3 |
| #4 | Marvin-Henry Grove | 2 |
| #5 | Douglas-Haldane Annin | 1 |
| #6 | Arsdale Lyle R Van | 1 |
| #7 | Kim Kee W | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA382113A | Fluid flow regulator | |
| CA409411A | Pressure regulator | |
| CA382112A | Gas flow regulator |