Roger B. Ela

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Spencer, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Chuck control for a workpiece holding electromagnet
- Patent number 4,633,361
- Issue date Dec 30, 1986
- Walker Magnetics Group, Inc.
- Roger B. Ela
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Lifting magnet system
- Patent number 4,600,964
- Issue date Jul 15, 1986
- Walker Magnetics Group, Inc.
- Roger B. Ela
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Demagnetizing apparatus for a workpiece holding electromagnet
- Patent number 4,370,693
- Issue date Jan 25, 1983
- Donald C. McDonald
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Load tilting magnetic lift
- Patent number 4,044,894
- Issue date Aug 30, 1977
- Walker Magnetics Group, Inc.
- Donald C. McDonald
- B66 - HOISTING LIFTING HAULING