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Metal detector
US 2,587,158 A
Filed
: 02/27/1948
Issued
: 02/26/1952
Est. Priority Date
: 02/27/1948
Status: Expired due to Term
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Current Assignee
Alf H. Hofberg
Original Assignee
Alf H. Hofberg
Inventors
Hofberg, Alf H.
Application Number
US03/011,540
Time in Patent Office
1,460 Days
Field of Search
US Class Current
209/573
CPC Class Codes
B07C 2501/0036
Sorting out metallic particles
B07C 5/344
according to electric or el...
G01V 3/104
using several coupled or un...
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