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Tubular core and method
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Patent number 10,933,455
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Issue date Mar 2, 2021
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Pacific Roller Die Company, Inc.
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Robert F. Miller
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Ribbed spiral pipe
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Patent number 7,757,720
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Issue date Jul 20, 2010
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Pacific Roller Die Company, Inc.
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Robert F. Miller
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Active mold apparatus
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Patent number 7,175,406
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Issue date Feb 13, 2007
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PRD Company, Inc.
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Daniel D. Freitas
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Composite pipe assembly and components
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Patent number 7,108,294
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Issue date Sep 19, 2006
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Pacific Roller Die Company, Inc.
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Robert F. Miller
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Composite metal pipe coupling and assembly
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Patent number 7,083,204
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Issue date Aug 1, 2006
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Pacific Roller Die Company, Inc.
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Robert F. Miller
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Apparatus for forming tapered spiral tubes
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Patent number 6,339,945
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Issue date Jan 22, 2002
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Pacific Roller Die Co., Inc.
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Robert E. Miller
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Bellows pipe construction
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Patent number 5,158,115
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Issue date Oct 27, 1992
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Robert E. Miller
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Pipe coupling method
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Patent number 5,131,693
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Issue date Jul 21, 1992
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Pacific Roller Die Co., Inc.
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Robert F. Miller
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Method of making bellows pipe
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Patent number 5,074,138
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Issue date Dec 24, 1991
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Robert F. Miller
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Pipe coupling
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Patent number 4,416,474
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Issue date Nov 22, 1983
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Robert F. Miller
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...