Donald C. Hill

Follow

Person

Pasadena, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Fusion weld method and assembly for forming a fusion welded joint b...
- Patent number 4,906,313
- Issue date Mar 6, 1990
- R. W. Lyall & Company, Inc.
- Donald C. Hill
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Apparatus and method of forming fusion welded butt joint between th...
- Patent number 4,718,698
- Issue date Jan 12, 1988
- R. W. Lyall & Company, Inc.
- Donald C. Hill
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Pipe repair coupling
- Patent number 4,386,796
- Issue date Jun 7, 1983
- R. W. Lyall Co., Inc.
- Robert W. Lyall
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Biased open direct response valve with damping means
- Patent number 4,257,452
- Issue date Mar 24, 1981
- R. W. Lyall & Co., Inc.
- Donald C. Hill
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Slip fit type tubing coupling
- Patent number 4,243,254
- Issue date Jan 6, 1981
- R. W. Lyall & Co., Inc.
- Donald C. Hill
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...