Difference between revisions of "Patent for A system of circular electric rheostat with a plate and graduated resistance for special application to light distribution mechanisms in theaters. (Q31813)"
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(Created claim: Field (P19): lighting and projection (Q7)) | (Created claim: Publication date (P40): 16 September 1922) | ||||||||||||||
| Property / Publication date | |||||||||||||||
| + | 16 September 1922Gregorian
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| Property / Publication date: 16 September 1922Gregorian / rank | |||||||||||||||
| + | Normal rank | ||||||||||||||
Revision as of 07:35, 27 July 2023
No description defined
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Patent for A system of circular electric rheostat with a plate and graduated resistance for special application to light distribution mechanisms in theaters. | No description defined |
Statements
16 September 1922Gregorian
0 references