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US Patent: 405,163
Elevator-hatchway
Patentees:
Christian Petersen (exact or similar names) - Baltimore, MD
Francis X. Hooper (exact or similar names) - Baltimore, MD

USPTO Classifications:
187/338

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
John E. Morris
John T. Maddox

Patent Dates:
Applied: Aug. 07, 1888
Granted: Jun. 11, 1889

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for F. X. Hooper Co.

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