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US Patent: 419,990
Spring-tooth harrow
Patentees: Samuel Nevin Hench (exact or similar names) - York, PA Walker A. Dromgold (exact or similar names) - York, PA USPTO Classifications: 172/707 Tool Categories: agricultural : harrows Assignees: None Manufacturer: Hench & Dromgold Co. - York, PA Witnesses: David O. Prince William F. Eichar	Patent Dates: Applied: Nov. 26, 1889 Granted: Jan. 21, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Hench & Dromgold Co.

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