Growing community of inventors

Marshfield, WI, United States of America

Doug Spannring

Average Co-Inventor Count = 4.00

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 = 5

Doug Spannring ↔ Raymond Alan Richetta (1 patent)Doug Spannring ↔ Michael Curtis (1 patent)Doug Spannring ↔ Eric Carpenter (1 patent)Doug SpannringDoug Spannring (1 patent)Raymond Alan RichettaRaymond Alan Richetta (38 patents)Michael CurtisMichael Curtis (4 patents)Eric CarpenterEric Carpenter (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hitachi Global Storage Technologies Netherlands B.v. (1 from 2,636 patents)


1 patent:

1. 7271969 - Apparatus for providing high speed, linear-phase interpolation

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1/19/2026
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