x-patents:x-4721
Table of Contents
Patent X-4721: 1827-03-27, Grinding and polishing hard and soft substances
| X Number | Date | Inventor | City | Title | Status |
|---|---|---|---|---|---|
| X-4721 | 1827-03-27 | Benjamin Green | Hartford, VT | Grinding and polishing hard and soft substances | Missing |
Comments
Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. Little is known about this patent. There are no patent drawings available. This patent is in the database for reference only.
Information Sources
(To be filled in.)
External links
x-patents/x-4721.txt · Last modified: 2019/05/25 21:49 by 127.0.0.1