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US Patent: 533,388
Register-valve
Patentee: Henry Bolthoff (exact or similar names) - Denver, CO USPTO Classifications: 137/625.31, 251/170, 251/281, 251/286 Tool Categories: propulsion and energy : steam apparatus : stationary boilers : steam valves propulsion and energy : steam apparatus : steam valves Assignees: None Manufacturer: Not known to have been produced Witnesses: Charles E. Dawson G. J. Rollandet	Patent Dates: Applied: Jun. 25, 1894 Granted: Jan. 29, 1895 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Hendrie & Bolthoff Mfg. & Supply Co.

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