x-patents:x-5831
Table of Contents
Patent X-5831: 1830-02-16, Spiral spring truss
| X Number | Date | Inventor | City | Title | Status |
|---|---|---|---|---|---|
| X-5831 | 1830-02-16 | John J. Heintzelman | Philadelphia, PA | Spiral spring truss | Recovered |
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. Only the patent drawing is available. This patent is in the database for reference only.
Information Sources
(To be filled in.)
External links
x-patents/x-5831.txt · Last modified: 2019/05/25 21:49 by 127.0.0.1