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COMBINATION LEVEL,RULE AND PROTRACTOR DEVICE
US 3,522,657 A
Filed
: 02/19/1969
Issued
: 08/04/1970
Est. Priority Date
: 02/19/1969
Status: Expired due to Term
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40 Citations
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Current Assignee
Raymond R. Metrulis
Original Assignee
Raymond R. Metrulis
Inventors
Metrulis, Raymond R.
Application Number
US04/800,507
Time in Patent Office
531 Days
Field of Search
US Class Current
33/342
CPC Class Codes
G01B 3/08
extensible
G01C 9/24
in closed containers partia...
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