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Aircraft of the lighter-than-air type
US 1,390,745 A
Filed
: 11/24/1919
Issued
: 09/13/1921
Est. Priority Date
: 11/24/1919
Status: Expired due to Term
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Current Assignee
Lavanda M. Armstrong
Original Assignee
Lavanda M. Armstrong
Inventors
Armstrong, Lavanda M.
Application Number
US02/340,328
Time in Patent Office
659 Days
Field of Search
US Class Current
244/30
CPC Class Codes
B64B 1/62
Controlling gas pressure, h...
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