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Apparatus for electrically perforating polymer sheet material
US 2,763,759 A
Filed
: 04/14/1953
Issued
: 09/18/1956
Est. Priority Date
: 04/14/1953
Status: Expired due to Term
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27
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Current Assignee
Etsutoshi Takeuchi
,
Naohiko Fukuoka
,
Sanai Mito
Original Assignee
Etsutoshi Takeuchi
,
Naohiko Fukuoka
,
Sanai Mito
Inventors
SANAI MITO
,
ETSUTOSHI TAKEUCHI
,
NAOHIKO FUKUOKA
Application Number
US03/348,774
Time in Patent Office
1,253 Days
Field of Search
US Class Current
219/384
CPC Class Codes
B26F 1/28
by electrical discharges
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