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US Patent: 2,273,529
Hum eliminator
Patentee:
Kiefer William Ray (exact or similar names) - Rockford, IL

USPTO Classifications:
417/542

Tool Categories:

Assignees:
Sundstrand Engineering Co. - Rockford, IL

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Dec. 23, 1939
Granted: Feb. 17, 1942

Patent Pictures:
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