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US Patent: 3,230,516
Control System for Machine Tools and the Like
Patentees: Leif Eric De Neergaard, deceased (Estate of) (exact or similar names) - Chicago, Cook County, IL Northern Trust Co., Executor (exact or similar names) - Chicago, Cook County, IL USPTO Classifications: 318/162, 318/568.1, 318/608, 360/79 Tool Categories: metalworking machines : machine tool controls Assignees: Frederic W. Olmstead, Trustee - Washington, DC Hans W. Trechsel, Trustee - Madison, Dane County, WI Deryck A. Gerard, Trustee - Minneapolis, Hennepin County, MN Norman S. Parker, Trustee - Evanston, Cook County, IL Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 13, 1959 Granted: Jan. 18, 1966 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Gisholt Machine Co.

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