Growing community of inventors

Shoreview, MN, United States of America

Michael J Dufresne

Average Co-Inventor Count = 3.15

ph-index = 4

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 = 389

Michael J DufresneCharles E Ring (2 patents)Michael J DufresneJose F Brenes (2 patents)Michael J DufresnePaul D Wyatt (2 patents)Michael J DufresneBruce A Finger (2 patents)Michael J DufresneDonald A Whitehurst (2 patents)Michael J DufresneLeRoy J Lundblad (2 patents)Michael J DufresneDave R Zeipelt (1 patent)Michael J DufresneDavid R Zeipelt (1 patent)Michael J DufresneDennis D Mattson (1 patent)Michael J DufresneMichael J Dufresne (4 patents)Charles E RingCharles E Ring (5 patents)Jose F BrenesJose F Brenes (3 patents)Paul D WyattPaul D Wyatt (3 patents)Bruce A FingerBruce A Finger (3 patents)Donald A WhitehurstDonald A Whitehurst (3 patents)LeRoy J LundbladLeRoy J Lundblad (2 patents)Dave R ZeipeltDave R Zeipelt (1 patent)David R ZeipeltDavid R Zeipelt (1 patent)Dennis D MattsonDennis D Mattson (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Bmc Industries, Inc. (4 from 27 patents)


4 patents:

1. 6537459 - Method and apparatus for etching-manufacture of cylindrical elements

2. 6468439 - Etching of metallic composite articles

3. 6365057 - Circuit manufacturing using etched tri-metal media

4. 6086773 - Method and apparatus for etching-manufacture of cylindrical elements

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as of
12/13/2025
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