Growing community of inventors

Hamburg, PA, United States of America

Stewart G Helfrich

Average Co-Inventor Count = 2.00

ph-index = 1

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 = 8

Stewart G HelfrichPeter J Hauser (1 patent)Stewart G HelfrichStewart G Helfrich (1 patent)Peter J HauserPeter J Hauser (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. The Virkler Company (1 from 5 patents)


1 patent:

1. 5667533 - Heather dyed fabric and method of producing same

Please report any incorrect information to support@idiyas.com
idiyas.com
as of
1/9/2026
Loading…