Growing community of inventors

Auburn, MI, United States of America

Stephen C Gromak

Average Co-Inventor Count = 2.00

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 = 32

Stephen C GromakJames A Palmer (2 patents)Stephen C GromakStephen C Gromak (2 patents)James A PalmerJames A Palmer (3 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Amigo Sales, Inc. (1 from 10 patents)

2. Mobility Manufacturing Co. (1 from 1 patent)


2 patents:

1. D283211 - Steerable detachable wheelchair prime mover

2. 4503925 - Detachable steerable power unit for occupant-propelled wheelchairs

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as of
12/19/2025
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