Vocal Engines, December 10, 1878
Item
- Title
- Vocal Engines, December 10, 1878
- Author
- Thomas A. Edison
- Date Executed
- 1878-08-31
- Date Filed
- 1878-11-27
- Date Issued
- 1878-12-10
- Type
- Patent Issued
- Subject
- Miscellany
- Document ID
- PAT210767
- Rights
- Edison's patents are in the public domain and have been made available through the generosity of David Kovanen.
- Publisher
- The Thomas A. Edison Papers