Charles W. Schaeffer

Follow

Person

Lebanon, PA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Mine roof/bolt anchor assembly and method of installation thereof
- Patent number 5,352,066
- Issue date Oct 4, 1994
- The Eastern Company
- Charles W. Schaeffer
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mine roof support anchor and process for installing the same
- Patent number 4,859,118
- Issue date Aug 22, 1989
- Birmingham Bolt Company, Inc.
- Charles W. Schaeffer
- E21 - EARTH DRILLING MINING
Information Patent Grant
Apparatus for making a transition plate for a mine roof truss
- Patent number 4,429,560
- Issue date Feb 7, 1984
- Bethlehem Steel Corporation
- Charles W. Schaeffer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Transition plate for a mine roof truss
- Patent number 4,395,161
- Issue date Jul 26, 1983
- Bethlehem Steel Corporation
- Edwin B. Wilson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method of making metal forming punches
- Patent number 4,345,492
- Issue date Aug 24, 1982
- Bethlehem Steel Corporation
- Emerson D. Spengler
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Load indicator washer
- Patent number 4,149,446
- Issue date Apr 17, 1979
- Bethlehem Steel Corporation
- Emerson D. Spengler
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...