Difference between revisions of "Patent for a shutter system for stage-lighting spotlights by Joseph H Labrum (Q31194)"
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(Created claim: Field (P19): lighting and projection (Q7)) | (Created claim: Publication date (P40): 1 July 1980) | ||||||||||||||
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| + | 1 July 1980
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| Property / Publication date: 1 July 1980 / rank | |||||||||||||||
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Revision as of 19:55, 30 April 2023
No description defined
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Patent for a shutter system for stage-lighting spotlights by Joseph H Labrum | No description defined |
Statements
1 July 1980
0 references