Patent International Class: E03B 7/10
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Freeze-resistant plastic pipe and method for its manufacture
Inventor: Francis | Patent Number: 4773448
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Freeze-resistant plastic pipe and method for its manufacture
Inventor: Francis | Patent Number: 4773448
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Method for thawing out road culverts choked with ice
Inventor: Olsson | Patent Number: 4770211
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Dump valve assembly
Inventor: Frantz | Patent Number: 4766925
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Freeze safe valve
Inventor: Roper | Patent Number: 4766923
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Water/air pumping system
Inventor: Houser, et al. | Patent Number: 4755112
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Water/air pumping system
Inventor: Houser, et al. | Patent Number: 4755112
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Method for preventing thaw settlement along offshore artic pipelines
Inventor: Duthweiler | Patent Number: 4676695
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Antiburst system for water lines
Inventor: Wadleigh | Patent Number: 4649959
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Antiburst system for water lines
Inventor: Wadleigh | Patent Number: 4649959
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Automatic water line freeze control
Inventor: Netter | Patent Number: 4635668
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Method and system for relieving pipeline stress due to frost action
Inventor: Sayles, et al. | Patent Number: 4629364
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Electric heating apparatus for providing freeze protection for fluid-control devices at well sites
Inventor: Ball | Patent Number: 4558206
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Water supply winterizing system
Inventor: Sandt, et al. | Patent Number: 4531538
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Valve mechanism
Inventor: Pirkle | Patent Number: 4460007
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Air conditioner
Inventor: Yokoyama | Patent Number: 4459815
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Solar heater system and valve
Inventor: Schoenheimer, et al. | Patent Number: 4454890
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Snap-acting drain valve
Inventor: Harasewych | Patent Number: 4361167
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Prevention of freeze damage to liquid conduits
Inventor: Reed | Patent Number: 4321908
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Faucet structure
Inventor: Steinwand | Patent Number: 4314580
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Process and apparatus for the preparation of hot water from solar energy
Inventor: Oquidam | Patent Number: 4309982
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Protection against the freezing of solar collectors
Inventor: Durand, et al. | Patent Number: 4308856
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Apparatus for and method of freeze protecting plumbing
Inventor: Lacoste | Patent Number: 4286613
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Fluid storage device
Inventor: Hutchins, et al. | Patent Number: 4281687
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Closed pressurized solar heating system with automatic valveless solar collector drain-back
Inventor: Embree | Patent Number: 4269167
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Animal watering system
Inventor: Vorbeck | Patent Number: 4269147
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Thermostatic self-powered drain valve
Inventor: Shelton | Patent Number: 4243062
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Drain valve assembly
Inventor: Burris, et al. | Patent Number: 4232696
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Protective unit for water pipes and a method for setting the unit
Inventor: Tagami | Patent Number: 4215726
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Protective unit for water pipes and a method for setting the unit
Inventor: Tagami | Patent Number: 4215726
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Plastic pipe heater
Inventor: Peterson, et al. | Patent Number: 4110603
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Freezeproof sanitary water supply appliance
Inventor: Arledge, II | Patent Number: 4096877