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AGGREGATE SIZE TESTING APPARATUS AND PROCESS
US 3,439,800 A
Filed
: 01/09/1967
Issued
: 04/22/1969
Est. Priority Date
: 01/09/1967
Status: Expired due to Term
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Current Assignee
Burl D. Tonjes
Original Assignee
Burl D. Tonjes
Inventors
Tonjes, Burl D.
Application Number
US04/608,011
Time in Patent Office
834 Days
Field of Search
US Class Current
209/3
CPC Class Codes
B07B 1/28
Moving screens not otherwis...
Y10T 74/18064
Head motions
Y10T 74/2154
Counterbalanced
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