Buttonhole gauges
United States Patent 3137254
US Patent References:
/1237569.html
- - 1237569

/1249301.html
- - 1249301

Buttonhole-making guide
- - 1727776


Inventors:
Enos, John P.
Johnson, Ralph E.
Publication Date:
06/16/1964
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Assignee:
SINGER CO
Primary Class:
112/75
Other Classes:
112/115
International Classes:
D05B3/24; D05B3/00
Foreign References:
GB837788A