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RX Patent: RX-8
Piano Action Improvement in Mode of Fitting the Hammer-Heads of Piano-Fortes
Patentee: John Mackay (exact or similar names) - Boston, Middlesex County, MA USPTO Classifications: 84/254 Tool Categories: trade specific : music instrument maker Assignees: None Manufacturer: Not known to have been produced Witnesses: Thomas P. Jones Linton Thorn	Patent Dates: Granted: Apr. 18, 1839 Reissue Information: Reissue of 5,189X (Aug. 14, 1828) Patent Pictures: Report data errors or omissions to steward Joel Havens X-Patents USPTO Images USPTO Info
Description: RX patents are reissues of X patents that were destroyed in the Dec. 1836 patent office fire.

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