Hermann Ruhl

Follow

Person

Toronto, CA

People

Patents Grantslast 30 patents

Information Patent Grant
Transportation equipment recorder with time accuracy
- Patent number 4,656,488
- Issue date Apr 7, 1987
- Hermann Ruhl
- G07 - CHECKING-DEVICES
Information Patent Grant
Transportation equipment recorder for highlighting operating parame...
- Patent number 4,633,270
- Issue date Dec 30, 1986
- Hermann Ruhl
- G07 - CHECKING-DEVICES
Information Patent Grant
Recorder with circuit line tamper indicating system
- Patent number 4,595,932
- Issue date Jun 17, 1986
- Hermann Ruhl
- G07 - CHECKING-DEVICES
Information Patent Grant
Variable acceleration monitoring system
- Patent number 4,293,844
- Issue date Oct 6, 1981
- Hermann Ruhl
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Speed control device
- Patent number 4,245,598
- Issue date Jan 20, 1981
- Hermann Ruhl
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Acceleration warning device
- Patent number 4,171,030
- Issue date Oct 16, 1979
- Hermann Ruhl
- B60 - VEHICLES IN GENERAL