Growing community of inventors

Charlotte, MI, United States of America

Roy Frank Engelbrecht

Average Co-Inventor Count = 2.86

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 = 9

Roy Frank EngelbrechtTerry Kyle Olson (2 patents)Roy Frank EngelbrechtRussell Floyd Rugg (1 patent)Roy Frank EngelbrechtMichael Paul Boks (1 patent)Roy Frank EngelbrechtMichael Allen Campeau (1 patent)Roy Frank EngelbrechtRoy Frank Engelbrecht (2 patents)Terry Kyle OlsonTerry Kyle Olson (2 patents)Russell Floyd RuggRussell Floyd Rugg (1 patent)Michael Paul BoksMichael Paul Boks (1 patent)Michael Allen CampeauMichael Allen Campeau (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Spartan Motors, Inc. (2 from 24 patents)


2 patents:

1. 8876160 - Vehicle chassis with anti-camber

2. 8511741 - Recreational vehicle having chassis with integral cap

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1/9/2026
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