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Plastic pipe heater
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Patent number 5,017,760
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Issue date May 21, 1991
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GB Electrical, Inc.
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Lee A. Miller
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Bending plastic pipe
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Patent number 4,255,378
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Issue date Mar 10, 1981
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Lee A. Miller
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Plastic pipe bending jig
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Patent number 4,156,588
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Issue date May 29, 1979
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Lee A. Miller
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL