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Device to produce sleep inducing sound
US 2,711,165 A
Filed
: 12/09/1953
Issued
: 06/21/1955
Est. Priority Date
: 12/09/1953
Status: Expired due to Term
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Current Assignee
Max H. Leavenworth
Original Assignee
Max H. Leavenworth
Inventors
Leavenworth, Max H.
Application Number
US03/397,235
Time in Patent Office
559 Days
Field of Search
US Class Current
600/28
CPC Class Codes
A61M 2021/0027
by the hearing sense
A61M 21/00
Other devices or methods to...
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