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US Patent: 1,342,128
Injector
Patentees:
James Metcalfe (exact or similar names) - Marple, England
Richard David Metcalfe (exact or similar names) - Romiley, England

USPTO Classifications:
417/167

Tool Categories:
propulsion and energy : steam apparatus : water injectors
propulsion and energy : steam apparatus : stationary boilers : feedwater apparatus

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Nov. 06, 1919
Granted: Jun. 01, 1920

Patent Pictures:
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