Growing community of inventors

Schaumburg, IL, United States of America

David E Clarke

Average Co-Inventor Count = 1.33

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 = 23

David E ClarkeLawrence I Richards (1 patent)David E ClarkeDavid E Clarke (2 patents)Lawrence I RichardsLawrence I Richards (3 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Advance Lifts, Inc. (2 from 11 patents)


2 patents:

1. 4394888 - Bridging bar attachment means for bi-elevational platform lift

2. 4091906 - Collapsible safety guard for platform lift

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as of
12/18/2025
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