US Patent: 3,230,516
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| Control System for Machine Tools and the Like
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Patentees:
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| 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 |
| Assignees: |
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Frederic W. Olmstead, Trustee - Washington, DC |
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Hans W. Trechsel, Trustee - Madison, Dane County, WI |
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Deryck A. Gerard, Trustee - Minneapolis, Hennepin County, MN |
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Norman S. Parker, Trustee - Evanston, Cook County, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 13, 1959 |
| Granted: |
Jan. 18, 1966 |
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Joel Havens
"Vintage Machinery" entry for Gisholt Machine Co.
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