Growing community of inventors

White Pigeon, MI, United States of America

David Markel

Average Co-Inventor Count = 3.00

ph-index = 3

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 = 38

David MarkelWilliam B Leftwich (2 patents)David MarkelH Coleman Davis (2 patents)David MarkelTerry J McElmurry (2 patents)David MarkelDavid G Sheely (1 patent)David MarkelDavid Markel (3 patents)William B LeftwichWilliam B Leftwich (8 patents)H Coleman DavisH Coleman Davis (2 patents)Terry J McElmurryTerry J McElmurry (2 patents)David G SheelyDavid G Sheely (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Coachmen Industries, Inc. (3 from 32 patents)


3 patents:

1. 5231710 - Convertible sofa-bed

2. 4639953 - Rollover back sofa bed

3. 4625347 - Rollover back sofa-bed

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as of
1/10/2026
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