Difference between revisions of "Patent for a light projector by Herbert F King (Q31173)"

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(‎Created claim: Backup document (P74): US1680685.pdf)
(‎Created claim: Publication date (P40): 14 August 1928)
 
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14 August 1928Gregorian
Timestamp+1928-08-14T00:00:00Z
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CalendarGregorian
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Property / Publication date: 14 August 1928Gregorian / rank
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Latest revision as of 09:53, 30 April 2023

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Patent for a light projector by Herbert F King
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