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San Francisco, CA, United States of America

Johnson Lieu

Average Co-Inventor Count = 2.00

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 = 60

Johnson LieuErik Hartwig (2 patents)Johnson LieuJohnson Lieu (2 patents)Erik HartwigErik Hartwig (8 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Spotify Ab (2 from 637 patents)


2 patents:

1. 10187676 - Systems and methods for temporary access to media content

2. 9402093 - Systems and methods for temporary access to media content

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as of
12/12/2025
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