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TAMPER
US 3,453,940 A
Filed
: 11/28/1967
Issued
: 07/08/1969
Est. Priority Date
: 11/28/1967
Status: Expired due to Term
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0
Petitions
6
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6 Citations
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Current Assignee
John G. Berkhoudt
,
John M. Melisz
Original Assignee
John G. Berkhoudt
,
John M. Melisz
Inventors
Berkhoudt, John G.
,
Melisz, John M.
Application Number
US04/686,157
Time in Patent Office
588 Days
Field of Search
US Class Current
404/133.1
CPC Class Codes
E02D 3/046
by tamping or vibrating, e....
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