| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 2 | |
| #2 | Austria | 1 | |
| #3 | Canada | 1 | |
| #4 | German Democratic Republic | 1 | |
| #5 | Germany | 1 | |
| #6 | France | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | Italy | 1 | |
| #9 | Japan | 1 | |
| #10 | Netherlands | 1 | |
| #11 | Sweden | 1 | |
| #12 | USSR (Union of Socialist Soviet Republics) | 1 | |
| #13 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Pistons and sealings | |
| #2 | Servomotors |
| # | Name | Total Patents |
|---|---|---|
| #1 | Frey Bernhard | 5 |
| #2 | Berunharuto Furei | 1 |
| #3 | Bernhard Frey | 1 |
| #4 | Frej Bernkhard | 1 |
| #5 | Frey B | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA1040065A | Cylinder-piston combination, particularly for high-pressure application | |
| DD123010A5 | Thrust piston drive | |
| CH604045A5 | Thrust piston drive with sealing tube | |
| CH591034A5 | Thrust piston drive with sealing tube - tube of elastomer to cooperate with moving parts yet leak free (BE170676) |