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US Patent: 1,679,825
Rotary Well Drilling Machine
Patentees: Julius H. Holmgreen (exact or similar names) - San Antonio, Bexar County, TX Richard J. Holmgreen (exact or similar names) - San Antonio, Bexar County, TX USPTO Classifications: 285/401, 464/163, 74/405, 74/417 Tool Categories: specialty machines : well drilling machines Assignees: Alamo Iron Works - San Antonio, Bexar County, TX Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 23, 1923 Granted: Aug. 07, 1928 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Alamo Iron Works, Inc.

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