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US 2,980,887 A
Filed
: 05/22/1957
Issued
: 04/18/1961
Est. Priority Date
: 05/22/1957
Status: Expired due to Term
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13 Citations
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Current Assignee
John W. Soderberg
Original Assignee
John W. Soderberg
Inventors
Soderberg, John W.
Application Number
US03/660,932
Time in Patent Office
1,427 Days
Field of Search
US Class Current
340/934
CPC Class Codes
G08G 1/0104
Measuring and analyzing of ...
G08G 1/042
using inductive or magnetic...
G08G 1/08
according to detected numbe...
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