Growing community of inventors

Seattle, WA, United States of America

Ellen L Ratajak

Average Co-Inventor Count = 4.00

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 = 2,125

Ellen L RatajakJeffrey P Bezos (5 patents)Ellen L RatajakSheldon J Kaphan (5 patents)Ellen L RatajakThomas K Schonhoff (5 patents)Ellen L RatajakEllen L Ratajak (5 patents)Jeffrey P BezosJeffrey P Bezos (145 patents)Sheldon J KaphanSheldon J Kaphan (9 patents)Thomas K SchonhoffThomas K Schonhoff (5 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Amazon Technologies, Inc. (5 from 22,119 patents)


5 patents:

1. 8732011 - System for implementing a performance-based customer referral program

2. 8494923 - Internet-based customer referral system

3. 7512548 - Use of shopping cart to collect and purchase items selected from multiple web sites

4. 7337133 - Internet-based customer referral system

5. 6029141 - Internet-based customer referral system

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as of
9/10/2025
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