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Providence, RI, United States of America

Helena R Chang

Average Co-Inventor Count = 3.00

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 = 2

Helena R ChangMark C Glassy (2 patents)Helena R ChangKeiji Koda (2 patents)Helena R ChangHelena R Chang (2 patents)Mark C GlassyMark C Glassy (13 patents)Keiji KodaKeiji Koda (2 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. University of California (1 from 15,471 patents)

2. Viventia Biotech Inc. (1 from 5 patents)

3. Sci-clone, Inc. (1 from 1 patent)


2 patents:

1. 6355444 - Carcinoma associated antigen (SK1) monoclonal antibodies against SK1, methods of producing these antibodies and uses therefor

2. 5637493 - Carcinoma associated antigen (SK1) monoclonal antibodies against SK1,

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12/21/2025
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