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Keiziro Sakai
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Hitachi, JP
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last 30 patents
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Patent Grant
Control apparatus for an automatic pipe welder
Patent number
4,163,886
Issue date
Aug 7, 1979
Hitachi, Ltd.
Tsutomu Omae
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Method for controlling an automatic pipe welder
Patent number
4,144,992
Issue date
Mar 20, 1979
Hitachi, Ltd.
Tsutomu Omae
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR