for concrete pipes

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Patents Grantslast 30 patents

Information Patent Grant
Segmental duct coupler devices, systems, and methods
- Patent number 11,473,302
- Issue date Oct 18, 2022
- STRUCTURAL TECHNOLOGIES IP, LLC
- Gregory A. Hunsicker
- E04 - BUILDING
Information Patent Grant
Multiwall pipe lip seal joint
- Patent number 7,942,422
- Issue date May 17, 2011
- Unisert Multiwall Systems, Inc.
- Kenneth Tierling
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Connected part of concrete pipe
- Patent number 4,026,582
- Issue date May 31, 1977
- Nippon Concrete Industries Co. Ltd.
- Nobuyuki Abe
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
2660199
- Patent number 2,660,199
- Issue date Nov 24, 1953
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
2405567
- Patent number 2,405,567
- Issue date Aug 13, 1946
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
2401092
- Patent number 2,401,092
- Issue date May 28, 1946
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
1968598
- Patent number 1,968,598
- Issue date Jul 31, 1934
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...