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US Patent: 3,621,998
Sheet grader
Patentee:
Victor Prochaska (exact or similar names) - Unknown, Austria

USPTO Classifications:
209/552, 209/643, 271/197

Tool Categories:
trade specific : printer

Assignees:
Durand Machine Works Ltd. - New Westminster, BC Canada

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 27, 1970
Granted: Nov. 23, 1971

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Durand Machine Works

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