Letter and form from H. Reader Lack, Controller General, the Patent Office, London to John Wesley Hackworth, Darlington

PART OF:
Correspondence accumulated by John Wesley Hackworth and Ann Hackworth
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

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