Assignee

LETZEL HELMUT

DE·2 granted patents·73 citations·filing 1985–1990

Technology mixE05B2 E05C2 F16P2 H01H2

Top patents by PatentIndex Score

2 records

0177US4659884ASafety interlock switching device for protecting equipmentLETZEL HELMUT·Filed 1985·Granted Apr 21, 1987·43 cites·11 claims
0253USRE34396ESafety interlock switching device for protecting equipmentLETZEL HELMUT·Filed 1990·Granted Oct 5, 1993·30 cites·11 claims

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