Growing community of inventors

Knoxville, TN, United States of America

John G Spangler

Average Co-Inventor Count = 3.36

ph-index = 3

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 = 28

John G SpanglerRobert A Nytko (5 patents)John G SpanglerDarrell Douglas (3 patents)John G SpanglerJonathan L Cornwell, Jr (3 patents)John G SpanglerAndrew Geouque (2 patents)John G SpanglerMichael Chuanbo Zhou (2 patents)John G SpanglerWilliam S Groh (1 patent)John G SpanglerNicholas D Renecle (1 patent)John G SpanglerKevin Zinn (1 patent)John G SpanglerJohn G Spangler (7 patents)Robert A NytkoRobert A Nytko (21 patents)Darrell DouglasDarrell Douglas (4 patents)Jonathan L Cornwell, JrJonathan L Cornwell, Jr (3 patents)Andrew GeouqueAndrew Geouque (3 patents)Michael Chuanbo ZhouMichael Chuanbo Zhou (2 patents)William S GrohWilliam S Groh (22 patents)Nicholas D RenecleNicholas D Renecle (3 patents)Kevin ZinnKevin Zinn (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Radio Systems Corporation (7 from 272 patents)


7 patents:

1. D1097842 - Wall transmitter

2. D1080915 - Pet door

3. D1007785 - Collar receiver

4. D986753 - Pet boundary transmitter

5. D986512 - Pet boundary collar receiver

6. D985407 - Pet boundary control panel

7. D575734 - Guardian battery door

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as of
12/26/2025
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