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US Patent: 33,153
Improvement in machines for forming barrel-heads
Patentees: John B. Dougherty (exact or similar names) - Rochester, NY P. H. Lawler (exact or similar names) - Spencerport, NY USPTO Classifications: 147/38 Tool Categories: trade specific : cooper Assignees: None Manufacturer: Dougherty & Dorsey - Rochester, NY P. H. Lawler - Rochester, NY Witnesses: Unknown	Patent Dates: Granted: Aug. 27, 1861 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for P. H. Lawler Vintage Machinery entry for John B. Dougherty

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