Electret device having charge maintained by radioactivity

Details Electret device having charge maintained by radioactivity Electret device having charge maintained by radioactivity

1974-10-15

1976-04-06

Claffy, Kathleen H.

Telegraphy

Systems

Printing

178DIG10, 17910041B, 307 88ET, 29592, 427 35, H04R 1900, H01G 702

Patent

active

039491781

ABSTRACT:
An electret device has a dielectric layer containing electret charges and a radioactive layer on one of the surfaces of the dielectric layer.

REFERENCES:
patent: 3095476 (1963-06-01), Crownover
patent: 3123511 (1964-03-01), Coleman
patent: 3448348 (1969-06-01), Stadler
patent: 3644605 (1972-02-01), Sessler et al.

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