South St. Paul, MN, US
Information
Patent Grant
Donaldson Company, Inc.
Francis A. Friedmann
F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information
Patent Grant
Donaldson Company, Inc.
Francis A. Friedmann
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Donaldson Company, Inc.
Francis A. Friedmann
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
