Growing community of inventors

Milford, MI, United States of America

William Stelzer

Average Co-Inventor Count = 1.15

ph-index = 5

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 = 55

William StelzerRoger E Doerfler (1 patent)William StelzerDavid T Ayers, Jr (1 patent)William StelzerWilliam Stelzer (5 patents)Roger E DoerflerRoger E Doerfler (5 patents)David T Ayers, JrDavid T Ayers, Jr (4 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Other (3 from 832,680 patents)

2. Kelsey-hayes Company (2 from 577 patents)


5 patents:

1. 4051832 - Solar heating panel

2. 4026269 - Solar heating systems

3. 4018024 - Louvered windows comprising insulating pairs of superimposed panes

4. 3980343 - Load responsive proportioning valve

5. 3937523 - Proportioning brake control device with bypass

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as of
12/6/2025
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