| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 7 | |
| #2 | France | 5 | |
| #3 | Japan | 5 | |
| #4 | United States | 5 | |
| #5 | United Kingdom | 4 | |
| #6 | German Democratic Republic | 3 | |
| #7 | Germany | 3 | |
| #8 | Austria | 1 | |
| #9 | Brazil | 1 | |
| #10 | Denmark | 1 | |
| #11 | Italy | 1 | |
| #12 | Sweden | 1 | |
| #13 | USSR (Union of Socialist Soviet Republics) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Servomotors | |
| #2 | Unspecified technologies | |
| #3 | Venting or aerating devices | |
| #4 | Presses |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ruchser Erich | 10 |
| #2 | Ott Helmut | 7 |
| #3 | Eritsuhi Rukusa | 5 |
| #4 | Ott H | 3 |
| #5 | Herumuto Otsuto | 3 |
| #6 | Ruchser E | 3 |
| #7 | Hemon Erich | 2 |
| #8 | Erich Ruchser | 2 |
| #9 | Baldauf Guenter | 2 |
| #10 | Eritsuhi Herion | 1 |
| Publication | Filing date | Title |
|---|---|---|
| JPS56138577A | Safety valve device | |
| US4345620A | Safety valve assembly | |
| US4237930A | Safety valve | |
| SU946413A3 | Distribution arrangement with electromagnetic actuator | |
| JPS5448327A | Control device | |
| DD136524A5 | Safety valve | |
| GB1422054A | Safety valves | |
| GB1291507A | A three way valve | |
| GB1332474A | Slide valve |