| Patents for F16K 37 - Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given (8,203) | |
|---|---|
| 02/1976 | |
| 02/17/1976 | US3938544 Valve with heat transport monitor for leakage determining rate |
| 02/10/1976 | US3937254 Device for monitoring control elements |
| 01/1976 | |
| 01/20/1976 | US3933174 Valve with a pulsation damping device |