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US Patent: 216,767
Improvement in sash-cord guides
Patentees: Frank B. Sloan (exact or similar names) - Baltimore, MD Frank S. Clarkson (exact or similar names) - Baltimore, MD USPTO Classifications: 16/211 Tool Categories: household : door and window hardware Assignees: None Manufacturer: Joseph Clarkson & Son - Baltimore, MD Witnesses: R. D. Williams J. C. Gittenger	Patent Dates: Applied: Apr. 29, 1879 Granted: Jun. 24, 1879 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Joseph Clarkson & Son
Description: Of interest because co-inventor Clarkson seems to have also been involved in making woodworking machinery.

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