William D. Helgeson

Follow

Person

Minneapolis, MN, US

People

Patents Grantslast 30 patents

Information Patent Grant
Method for making an electrochemical cell
- Patent number 5,455,123
- Issue date Oct 3, 1995
- Medtronic, Inc.
- William D. Helgeson
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Lithium-iodine electrochemical cells with improved end of life char...
- Patent number 5,209,994
- Issue date May 11, 1993
- Medtronic, Inc.
- David L. Blattenberger
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method for lithium anode and electrochemical cell fabrication
- Patent number 4,398,346
- Issue date Aug 16, 1983
- Medtronic, Inc.
- Lloyd J. Underhill
- H01 - BASIC ELECTRIC ELEMENTS