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William S. Wentink
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Rochester, MN, US
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last 30 patents
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Patent Grant
Optical tool for aligning transducer head assemblies
Patent number
4,630,150
Issue date
Dec 16, 1986
International Business Machines Corporation
David W. Collins
G11 - INFORMATION STORAGE
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Patent Grant
Data storage apparatus using a flexible magnetic disk
Patent number
4,089,029
Issue date
May 9, 1978
International Business Machines Corporation
Daniel O. Castrodale
G11 - INFORMATION STORAGE
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Patent Grant
Recording apparatus for magnetic disks using both sides of the disk
Patent number
RE29380
Issue date
Aug 30, 1977
International Business Machines Corporation
Daniel O. Castrodale
360 - Dynamic magnetic information storage or retrieval
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Patent Grant
Recording apparatus for magnetic disks using both sides of the disk
Patent number
3,946,439
Issue date
Mar 23, 1976
International Business Machines Corporation
Daniel Owen Castrodale
G11 - INFORMATION STORAGE