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Spatial music projecting device
US 2,636,943 A
Filed
: 02/13/1952
Issued
: 04/28/1953
Est. Priority Date
: 02/26/1951
Status: Expired due to Term
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Current Assignee
Pierre H. Schaeffer
Original Assignee
Pierre H. Schaeffer
Inventors
Schaeffer, Pierre H.
Application Number
US03/271,335
Time in Patent Office
440 Days
Field of Search
US Class Current
381/307
CPC Class Codes
H04R 3/12
for distributing signals to...
H04S 7/303
Tracking of listener positi...
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