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HOUSTON SYSTEMS MANUFACTURING COMPANY
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HOUSTON, TX, US
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Patents Grants
last 30 patents
Information
Patent Grant
High temperature dual butterfly valve
Patent number
4,377,181
Issue date
Mar 22, 1983
Houston Systems Manufacturing Co., Inc.
John C. H. Chan
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Valve bonnet for high temperature service
Patent number
4,344,454
Issue date
Aug 17, 1982
Houston Systems Manufacturing Co., Inc.
John C. H. Chan
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Air diffuser assembly
Patent number
4,279,842
Issue date
Jul 21, 1981
Houston Systems Manufacturing Co., Inc.
Robert E. Belveal
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Waste treatment apparatus
Patent number
4,259,182
Issue date
Mar 31, 1981
Houston Systems Manufacturing Co.
Robert E. Belveal
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Patents Applications
last 30 patents
Trademark
last 30 trademarks
Information
Trademark
73268040 - HELI FLOW
Serial number
73268040
Filing date
Jun 27, 1980
HOUSTON SYSTEMS MANUFACTURING COMPANY
12 - Vehicles
Information
Trademark
73268041 - H-F
Serial number
73268041
Registration number
1203476
Filing date
Jun 27, 1980
HOUSTON SYSTEMS MANUFACTURING COMPANY
11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes