Library · Foundational · 1867
Improvement in pneumatic railways — US 70,504
Alfred Ely Beach’s patent for a pneumatic railway and an early primary source in the history of tube transport.
The record

- Type
- Foundational
- Year
- 1867
- Publisher
- U.S. Patent Office / Google Patents
- Jurisdiction
- United States
- Verified on
- 28 Jul 2026
