Patent for Improvements in and relating to sound-transmission, sound-recording and sound-reproducing systems (Q38982)
Revision as of 09:40, 2 July 2025 by ChrisVG (talk | contribs) (Created claim: Property:P41: Item:Q38981)
patent for stereo concept and sterio (record) recording
- GB394325A
| Language | Label | Description | Also known as |
|---|---|---|---|
| English |
Patent for Improvements in and relating to sound-transmission, sound-recording and sound-reproducing systems
|
patent for stereo concept and sterio (record) recording
|
|
