Growing community of inventors

West Bend, WI, United States of America

Douglas D Ludwig

Average Co-Inventor Count = 4.00

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 = 12

Douglas D Ludwig ↔ David L Painter (2 patents)Douglas D Ludwig ↔ John H Free (2 patents)Douglas D Ludwig ↔ Leo A Groh (2 patents)Douglas D LudwigDouglas D Ludwig (2 patents)David L PainterDavid L Painter (28 patents)John H FreeJohn H Free (3 patents)Leo A GrohLeo A Groh (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Dart Industries Inc. (2 from 1,642 patents)


2 patents:

1. D261348 - Ribbed coffee urn lid

2. D261215 - Coffee urn lid

Please report any incorrect information to support@idiyas.com
idiyas.com
as of
1/21/2026
Loading…