Growing community of inventors

Collierville, TN, United States of America

Robert A Preston

Average Co-Inventor Count = 1.00

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 = 6

Robert A PrestonRobert A Preston (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Thyssenkrupp Elevator Corporation (1 from 22 patents)

2. Tk Elevator Corporation (3 patents)


1 patent:

1. 9463955 - Elevator operator interface with virtual activation

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as of
12/27/2025
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