Growing community of inventors

Rock Hill, MO, United States of America

John W Friend

Average Co-Inventor Count = 4.00

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 = 41

John W FriendDennis L Hoehne (1 patent)John W FriendDavid C Dorste (1 patent)John W FriendDonald L Tillotson (1 patent)John W FriendJohn W Friend (1 patent)Dennis L HoehneDennis L Hoehne (7 patents)David C DorsteDavid C Dorste (5 patents)Donald L TillotsonDonald L Tillotson (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Sporlan Valve Company (1 from 30 patents)


1 patent:

1. 5364066 - Dual port valve with stepper motor actuator

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12/16/2025
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