L. Robert Zifferer

Person

Waco, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Corrugated conduit and method of expanding to form a lined tubular...
- Patent number 8,434,207
- Issue date May 7, 2013
- Packless Industries
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Method of forming a lined tubular member
- Patent number 7,926,160
- Issue date Apr 19, 2011
- Packless Industries
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Method for forming a lined conduit
- Patent number 7,694,402
- Issue date Apr 13, 2010
- Packless Metal Hose, Inc.
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Apparatus and methods for forming internally and externally texture...
- Patent number 6,968,719
- Issue date Nov 29, 2005
- Packless Metal Hose, Inc.
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Method and apparatus for forming a modified conduit
- Patent number 6,923,035
- Issue date Aug 2, 2005
- Packless Metal Hose, Inc.
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Apparatus and methods for forming internally and externally texture...
- Patent number 6,760,972
- Issue date Jul 13, 2004
- Packless Metal Hose, Inc.
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Corrugated heat exchanger element having grooved inner and outer su...
- Patent number 6,488,079
- Issue date Dec 3, 2002
- Packless Metal Hose, Inc.
- L. Robert Zifferer
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Heat exchange element
- Patent number 5,551,504
- Issue date Sep 3, 1996
- Packless Metal Hose, Inc.
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Heat exchange element
- Patent number 5,409,057
- Issue date Apr 25, 1995
- Packless Metal Hose, Inc.
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

Patents Applicationslast 30 patents

Information Patent Application
CORRUGATED CONDUIT AND METHOD OF EXPANDING TO FORM A LINED TUBULAR...
- Publication number 20110252624
- Publication date Oct 20, 2011
- Packless Industries
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
METHOD AND APPARATUS FOR FORMING A LINED CONDUIT
- Publication number 20100229996
- Publication date Sep 16, 2010
- Packless Metal Hose, Inc.
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
Method and apparatus for forming a lined conduit
- Publication number 20070022800
- Publication date Feb 1, 2007
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
Corrugated conduit and method of expanding to form a lined tubular...
- Publication number 20060021210
- Publication date Feb 2, 2006
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
Apparatus and methods for forming internally and externally texture...
- Publication number 20040250587
- Publication date Dec 16, 2004
- Packless Metal Hose, Inc.
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
Method and apparatus for forming a modified conduit
- Publication number 20040226334
- Publication date Nov 18, 2004
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
Corrugated heat exchanger element having grooved inner and outer su...
- Publication number 20020121361
- Publication date Sep 5, 2002
- L. Robert Zifferer
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Application
Apparatus and methods for forming internally and externally texture...
- Publication number 20020033035
- Publication date Mar 21, 2002
- L. Robert Zifferer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

L. Robert Zifferer

Person

Patents Grantslast 30 patents

Corrugated conduit and method of expanding to form a lined tubular...

Method of forming a lined tubular member

Method for forming a lined conduit

Apparatus and methods for forming internally and externally texture...

Method and apparatus for forming a modified conduit

Apparatus and methods for forming internally and externally texture...

Corrugated heat exchanger element having grooved inner and outer su...

Heat exchange element

Heat exchange element

Patents Applicationslast 30 patents

CORRUGATED CONDUIT AND METHOD OF EXPANDING TO FORM A LINED TUBULAR...

METHOD AND APPARATUS FOR FORMING A LINED CONDUIT

Method and apparatus for forming a lined conduit

Corrugated conduit and method of expanding to form a lined tubular...

Apparatus and methods for forming internally and externally texture...

Method and apparatus for forming a modified conduit

Corrugated heat exchanger element having grooved inner and outer su...

Apparatus and methods for forming internally and externally texture...