Watertown, MA, US
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Patent Grant
Prototech Company
Henry G. Petrow
429 - Chemistry: electrical current producing apparatus, product, and process
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Patent Grant
Henry G. Petrow
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Patent Grant
Henry G. Petrow
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information
Patent Grant
Henry Petrow
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information
Patent Grant
Prototech Company
Henry G. Petrow
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Patent Grant
Henry G. Petrow
524 - Synthetic resins or natural rubbers
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Patent Grant
Henry G. Petrow
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information
Patent Grant
Prototech Company
Henry G. Petrow
H01 - BASIC ELECTRIC ELEMENTS
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Patent Grant
Prototech, Inc.
Henry G. Petrow
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Prototech Company
Henry G. Petrow
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Prototech Company
Henry G. Petrow
C01 - INORGANIC CHEMISTRY
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Patent Grant
Prototech Company
Henry G. Petrow
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
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Patent Grant
Prototech Company
Henry G. Petrow
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Prototech Company
Henry G. Petrow
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Henry G. Petrow
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Prototech Company
Henry G. Petrow
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
