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US Patent: 1,721,249
Gyratory fan
Patentee:
Frederick Diehl (exact or similar names) - Elizabeth, NJ

USPTO Classifications:
416/110, 74/86

Tool Categories:

Assignees:
Diehl Mfg. Co. - Elizabeth, NJ

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Apr. 27, 1928
Granted: Jul. 16, 1929

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Diehl Mfg. Co.
Description:
Improvement to patent 1,099,693.

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