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US Patent: 2,919,902
Hollow drill
Masonry drill
Patentee:
Milton J. Steffes (exact or similar names) - Dearborn, MI

USPTO Classifications:
175/394, 175/398, 175/403, 175/420.1, 175/421

Tool Categories:

Assignees:
Van Norman Industries, Inc. - Springfield, MA

Manufacturer:
Van Norman Industries, Inc. - Springfield, MA

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 31, 1955
Granted: Jan. 05, 1960

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Van Norman Machine Tool Co.

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