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US Patent: 37,772
Improvement in ventilators
Patentee:
Treat T. Prosser (exact or similar names) - Fond du Lac, WI

USPTO Classifications:
454/308

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
C. F. Smith
Gilbert B. Towles
Patent Dates:
Granted: Feb. 24, 1863

Patent Pictures:
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