Individual holder
PREHN LAWRENCE D
4 granted patents·11 citations·filing 1944–1957
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
4 records- 0154US4173025AElectrical signal scrambling apparatusPREHN LAWRENCE D·Filed 1946·Granted Oct 30, 1979·4 cites·11 claims
- 0249US4177485AFacsimile apparatusPREHN LAWRENCE D·Filed 1944·Granted Dec 4, 1979·3 cites·8 claims
- 0348US4177486AFacsimile devicePREHN LAWRENCE D·Filed 1944·Granted Dec 4, 1979·3 cites·1 claims
- 0428US4182929ACircuit for simulating the scrambling of an electromechanical rotorPREHN LAWRENCE D·Filed 1957·Granted Jan 8, 1980·1 cites·8 claims
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