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Double helical or double spiral gear
US 1,702,860 A
Filed
: 07/31/1925
Issued
: 02/19/1929
Est. Priority Date
: 09/12/1924
Status: Expired due to Term
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Current Assignee
Paul Bottcher
Original Assignee
Paul Bottcher
Inventors
Bottcher, Paul
Application Number
US02/047,355
Time in Patent Office
1,299 Days
Field of Search
US Class Current
74/466
CPC Class Codes
F16H 2055/0893
for parallel shaft arrangem...
F16H 55/08
Profiling
F16H 55/0846
Intersecting-shaft arrangem...
Y10T 74/19986
Twisted
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