Erik A. Ljung

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Stockholm, SE

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Patents Grantslast 30 patents

Information Patent Grant
Electrically driven hammer machine
- Patent number 4,601,351
- Issue date Jul 22, 1986
- Institut Cerac SA.
- Carl S. M. Hartwig
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Static converter switch with fast recovery freewheel diode
- Patent number 4,570,213
- Issue date Feb 11, 1986
- Institut Cerac SA.
- Erik A. Ljung
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and device for controlling a brushless alternating current m...
- Patent number 4,550,282
- Issue date Oct 29, 1985
- Institut Cerac SA.
- Carl S. M. Hartwig
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and means for feeding electric energy to a portable power tool
- Patent number 4,489,261
- Issue date Dec 18, 1984
- Atlas Copco Aktiebolag
- C. Sverker M. Hartwig
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER