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METER PROVING SYSTEM WITH LEAK DETECTION
US 3,530,705 A
Filed
: 06/10/1968
Issued
: 09/29/1970
Est. Priority Date
: 06/10/1968
Status: Expired due to Term
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Current Assignee
Francis M. Lathrop
Original Assignee
Francis M. Lathrop
Inventors
Lathrop, Francis M.
Application Number
US04/735,622
Time in Patent Office
841 Days
Field of Search
US Class Current
73/1.17
CPC Class Codes
G01F 25/11
using a seal ball or piston...
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