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US 2,952,790 A
Filed
: 07/15/1957
Issued
: 09/13/1960
Est. Priority Date
: 07/15/1957
Status: Expired due to Term
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Current Assignee
Gottfrid W. Steen
Original Assignee
Gottfrid W. Steen
Inventors
Steen, Gottfrid W.
Application Number
US03/671,781
Time in Patent Office
1,156 Days
Field of Search
US Class Current
378/139
CPC Class Codes
H01J 2235/168
against charged particles
H01J 35/16
Vessels; Containers; Shield...
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