USD163938S - douglas - Google Patents

douglas Download PDF

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Publication number
USD163938S
USD163938S US D163938 S USD163938 S US D163938S
Authority
US
United States
Prior art keywords
douglas
helicopter
leon
united states
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Prior art date
Application number
Other languages
English (en)
Inventor
Leon L. Douglas
Original Assignee
Kellett Aircraft Corporation
Filing date
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