Difference between revisions of "Patent for a light projector by Herbert F King (Q31173)"
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(Created claim: Copy available online (P37): https://patents.google.com/patent/US1680685A/en) | (Created claim: Backup document (P74): US1680685.pdf) | ||
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Revision as of 09:50, 30 April 2023
No description defined
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Patent for a light projector by Herbert F King | No description defined |