improved Means for Lighting Theatrical Stages and other Area, Harald Dohrn (Q22952)
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| Language | Label | Description | Also known as |
|---|---|---|---|
| English | improved Means for Lighting Theatrical Stages and other Area, Harald Dohrn | No description defined |
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Publication date
30 December 1915Gregorian
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This patent is filed at the UK patent office and is mainly a combination of the patents filed earlier by Von Salzmann in Germany. Additionally the concept of the stairs is added. (English)
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