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US Patent: 3,690,568
Wood grinding
Donald K. Alexander - Thunder Bay, ON Canada

USPTO Classifications:
241/15, 241/28, 241/282, 241/34

Tool Categories:
woodworking machines : specialty machines : wood grinding machines
specialty machines : paper making machines

Koehring-Waterous Ltd. - Brantford, ON Canada
Norton Co. of Canada - Hamilton, ON Canada
Great Lakes Paper Co., Ltd. - Thunder Bay, ON Canada
Montague Machine Co. - Turners Falls, MA
Norton Co. - Worcester, MA

Not known to have been produced


Patent Dates:
Applied: Nov. 17, 1970
Granted: Sep. 12, 1972

Patent Pictures:
USPTO pdf tiff
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