Harry L. Spears

Follow

Person

Spring, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Standing valve with a curved fin
- Patent number 6,283,148
- Issue date Sep 4, 2001
- Flowmore Systems, Inc.
- Harry L. Spears
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Downhole tool for use with a ball and seat traveling valve for a fl...
- Patent number 4,848,454
- Issue date Jul 18, 1989
- Harry L. Spears
- E21 - EARTH DRILLING MINING
Information Patent Grant
Travelling valve assembly for a fluid pump
- Patent number 4,599,054
- Issue date Jul 8, 1986
- Harry L. Spears
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Fluid pump
- Patent number 4,531,896
- Issue date Jul 30, 1985
- Harry L. Spears
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Fluid pump
- Patent number 4,504,199
- Issue date Mar 12, 1985
- Harry L. Spears
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...