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Class Information
Number: 451/78
Name: Abrading > Machine > Sandblast > Electrical device
Description: Abrading machine specifically designed to perform an abrading operation on an electrical device.

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
4281484 System for precisely and economically adjusting the resonance frequence of electroacoustic transducers Aug. 4, 1981
4063910 Apparatus for automatically adjusting the frequency of piezoelectric resonators in the form of bars or plates Dec. 20, 1977
4062154 Process for automatically adjusting the frequency of piezoelectric resonators in the form of bars or plates Dec. 13, 1977
3992819 Apparatus for equalizing the resistance value of an electrically conductive layer Nov. 23, 1976
3953941 Method and apparatus for making a groove in a semi-conductor element May. 4, 1976

1 2

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