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Lenexa, KS, United States of America

Howard W Stemm

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 = 15

Howard W StemmDonald Jansma (2 patents)Howard W StemmHoward W Stemm (2 patents)Donald JansmaDonald Jansma (2 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Bissell Health Care Corporation (2 from 6 patents)


2 patents:

1. 4877040 - Cigarette holder with filter modifier, and related method

2. 4856540 - Cigarette filter modifier

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12/18/2025
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