Eric G. Johnston

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Sterling, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for making a golf ball
- Patent number 6,533,566
- Issue date Mar 18, 2003
- Spalding Sports Worldwide, Inc.
- Michael John Tzivanis
- A63 - SPORTS GAMES AMUSEMENTS

Patents Applicationslast 30 patents

Information Patent Application
APPARATUS AND METHOD FOR MAKING A GOLF BALL
- Publication number 20060038323
- Publication date Feb 23, 2006
- Callaway Golf Company
- Michael John Tzivanis
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Application
Apparatus and method for making a golf ball
- Publication number 20030176239
- Publication date Sep 18, 2003
- SPALDING SPORTS WORLDWIDE, INC.
- Michael John Tzivanis
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Application
Apparatus and method for making a golf ball
- Publication number 20010012805
- Publication date Aug 9, 2001
- Spalding Sports Worldwide, Inc.
- Michael John Tzivanis
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL