Robert Walter Heisler

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Somerville, NJ, US

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Patents Grantslast 30 patents

Information Patent Grant
Pipe section including a gasketed spigot end and method of making t...
- Patent number 4,398,726
- Issue date Aug 16, 1983
- J-M Manufacturing Company Inc.
- Robert W. Heisler
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Method of making a coupling for rigid pressure pipe
- Patent number 4,329,193
- Issue date May 11, 1982
- Manville Service Corporation
- John L. Sznopek
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Mandrel for making a coupling for rigid pressure pipe
- Patent number 4,319,950
- Issue date Mar 16, 1982
- Manville Service Corporation
- John L. Sznopek
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Sealing ring for spigot and socket pipe joint
- Patent number 4,315,630
- Issue date Feb 16, 1982
- Johns-Manville Corporation
- David W. French
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method of and an assembly for forming the bell end of a bell and sp...
- Patent number 3,942,935
- Issue date Mar 9, 1976
- Johns-Manville Corporation
- Robert Walter Heisler
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL