Letter and form from H. Reader Lack, Controller General, the Patent Office, London to John Wesley Hackworth, Darlington
- Made:
- 1887-04-06
- part of archive:
- Hackworth Family Archive
- maker:
- Hackworth, John Wesley and Hackworth, Ann
Certificate of receipt of complete specification numbered 8875 [improvements in valve gear].
Details
- Extent:
-
2 items
- Identifier:
- HACK/3/1/47