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US 3,053,339 A
Filed
: 12/22/1959
Issued
: 09/11/1962
Est. Priority Date
: 09/07/1959
Status: Expired due to Term
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10
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Current Assignee
Hirotake Kawakami
,
Kaname Nakatsuru
,
Kanesuke Kishi
Original Assignee
Hirotake Kawakami
,
Kaname Nakatsuru
,
Kanesuke Kishi
Inventors
KANESUKE KISHI
,
KANAME NAKATSURU
,
HIROTAKE KAWAKAMI
Application Number
US03/861,262
Time in Patent Office
994 Days
Field of Search
US Class Current
181/158
CPC Class Codes
H04R 1/083
Special constructions of mo...
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