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US Patent: 1,621,738
Retard device
Patentees:
Joseph W. Motherwell (exact or similar names) - Melrose, Middlesex County, MA
Harry S. Baker (exact or similar names) - Arlington, Middlesex County, MA

USPTO Classifications:
137/382, 137/385, 137/553, 137/614.17, 84/271

Tool Categories:
hardware : valves

Assignees:
Ashton Valve Co. - Boston, Middlesex County, MA

Manufacturer:
Ashton Valve Co. - Boston, Middlesex County, MA

Witnesses:
Unknown

Patent Dates:
Applied: Aug. 18, 1925
Granted: Mar. 22, 1927

Patent Pictures:
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Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Ashton Valve Co.

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