Specification of patent for "Improvements in the Valve Gear of Three and Four-cylinder Locomotives" by Harold Holcroft
- PART OF:
- Patents
- Made:
- 1921-02-28
- part of archive:
- Papers of Harold Holcroft
- maker:
- Holcroft, Harold
Provisional specification for a patent by Harold Holcroft
Details
- Extent:
-
1 document
- Identifier:
- HOL/3/3