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John M. Choberka
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Pompano Beach, FL, US
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last 30 patents
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Patent Grant
Dot matrix print head
Patent number
4,362,406
Issue date
Dec 7, 1982
International Business Machines Corp.
John M. Choberka
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Patent Grant
Data matrix print head
Patent number
4,284,363
Issue date
Aug 18, 1981
International Business Machines Corp.
John M. Choberka
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS