Growing community of inventors

Phoenix, AZ, United States of America

John E Oldenburg

Average Co-Inventor Count = 2.00

ph-index = 1

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 0

John E Oldenburg ↔ David S Kultala (1 patent)John E OldenburgJohn E Oldenburg (1 patent)David S KultalaDavid S Kultala (25 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Karsten Manufacturing Corporation (1 from 1,901 patents)


1 patent:

1. 11896880 - Ultra high stiffness putter shaft

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12/27/2025
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