Title:
Valve seat cutting device
United States Patent 1923847

Inventors:
Seelert, Frederick W.
Publication Date:
08/22/1933
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Assignee:
Seelert, Frederick W.
Primary Class:
408/83.500
Other Classes:
408/111
International Classes:
B23C3/05; B23Q1/54; B23C3/00; B23Q1/25