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Wirral, United Kingdom

Robert Alexander Walker Johnstone

Average Co-Inventor Count = 6.00

ph-index = 2

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 = 4

Robert Alexander Walker JohnstoneJohn R Wade (2 patents)Robert Alexander Walker JohnstoneMichael John Pratt (2 patents)Robert Alexander Walker JohnstoneJohn Kynaston Davies (2 patents)Robert Alexander Walker JohnstoneMaria De Lurdes Dos Santos Cristiano (2 patents)Robert Alexander Walker JohnstoneSharon Dowd (2 patents)Robert Alexander Walker JohnstoneRobert Alexander Walker Johnstone (2 patents)John R WadeJohn R Wade (19 patents)Michael John PrattMichael John Pratt (12 patents)John Kynaston DaviesJohn Kynaston Davies (3 patents)Maria De Lurdes Dos Santos CristianoMaria De Lurdes Dos Santos Cristiano (2 patents)Sharon DowdSharon Dowd (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Agfa-gevaert (1 from 666 patents)

2. Afga-gevaert Nv (1 from 12 patents)


2 patents:

1. 6384264 - Photoactive materials applicable to imaging systems

2. 6171756 - Photoactive materials applicable to imaging systems

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as of
12/20/2025
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