Growing community of inventors

Argyle, TX, United States of America

Landon J Sproull

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 = 15

Landon J Sproull ↔ Richard H Barrett, Jr (1 patent)Landon J SproullLandon J Sproull (1 patent)Richard H Barrett, JrRichard H Barrett, Jr (5 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Paccar Inc. (1 from 1,176 patents)


1 patent:

1. D409541 - Exterior sun visor for a truck

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as of
12/19/2025
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