Growing community of inventors

Richmond Hill, Canada

Chuck Sperling

Average Co-Inventor Count = 6.00

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 = 1

Chuck Sperling ↔ Gabriel Iftime (2 patents)Chuck Sperling ↔ Peter Michael Kazmaier (2 patents)Chuck Sperling ↔ Eric J Shrader (2 patents)Chuck Sperling ↔ Sophie V Vandebroek (2 patents)Chuck Sperling ↔ Lauren Barclay (2 patents)Chuck SperlingChuck Sperling (2 patents)Gabriel IftimeGabriel Iftime (211 patents)Peter Michael KazmaierPeter Michael Kazmaier (184 patents)Eric J ShraderEric J Shrader (76 patents)Sophie V VandebroekSophie V Vandebroek (11 patents)Lauren BarclayLauren Barclay (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Xerox Corporation (2 from 24,195 patents)

2. Palo Alto Research Center Inc. (2 from 2,078 patents)


2 patents:

1. 8360541 - Reusable paper media with compatibility markings and printer with incompatible media sensor

2. 7935463 - Reusable paper media with compatibility markings and printer with incompatible media sensor

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as of
12/26/2025
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