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US Patent: 1,679,825
Rotary Well Drilling Machine
Patentees:
Julius H. Holmgreen - San Antonio, Bexar County, TX
Richard J. Holmgreen - 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, 1828

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Alamo Iron Works, Inc.

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