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Hartland, WI, United States of America

David Arthur Spence

Average Co-Inventor Count = 3.48

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 = 113

David Arthur SpenceKenneth Ruchala (1 patent)David Arthur SpenceGustavo H Olivera (1 patent)David Arthur SpencePaul J Reckwerdt (1 patent)David Arthur SpenceJames William Boyd (1 patent)David Arthur SpenceJustin Jerome Pipol (1 patent)David Arthur SpenceMichael David Thompson (1 patent)David Arthur SpenceRichard Cary Schmidt (1 patent)David Arthur SpenceDouglas James Henderson (1 patent)David Arthur SpenceRobert L Cravens (1 patent)David Arthur SpenceDaniel Lucas (1 patent)David Arthur SpenceAndrea Cox (1 patent)David Arthur SpenceCleber De Souza (1 patent)David Arthur SpenceDavid Arthur Spence (3 patents)Kenneth RuchalaKenneth Ruchala (30 patents)Gustavo H OliveraGustavo H Olivera (25 patents)Paul J ReckwerdtPaul J Reckwerdt (20 patents)James William BoydJames William Boyd (16 patents)Justin Jerome PipolJustin Jerome Pipol (9 patents)Michael David ThompsonMichael David Thompson (2 patents)Richard Cary SchmidtRichard Cary Schmidt (2 patents)Douglas James HendersonDouglas James Henderson (2 patents)Robert L CravensRobert L Cravens (1 patent)Daniel LucasDaniel Lucas (1 patent)Andrea CoxAndrea Cox (1 patent)Cleber De SouzaCleber De Souza (1 patent)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Tomotherapy Incorporated (2 from 30 patents)

2. Nordco Inc. (1 from 74 patents)


3 patents:

1. 9938669 - Roadworthy rail ballast regulator

2. 7835502 - Target pedestal assembly and method of preserving the target

3. 7801269 - Method and apparatus for calibrating a radiation therapy treatment system

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12/30/2025
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