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US 2,493,556 A
Filed
: 12/20/1947
Issued
: 01/03/1950
Est. Priority Date
: 12/20/1947
Status: Expired due to Term
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Current Assignee
Stone, Albert L.
Original Assignee
Stone, Albert L.
Inventors
Stone, Albert L.
Application Number
US02/792,892
Time in Patent Office
745 Days
Field of Search
US Class Current
285/123.7
CPC Class Codes
E21B 19/10
Slips; Spiders ; Catching d...
F16L 5/08
by means of axial screws co...
Y10T 24/3978
Screw actuated
Y10T 403/4958
Separate deforming means re...
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