Growing community of inventors

Norwalk, CT, United States of America

David L Chang

Average Co-Inventor Count = 1.80

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 = 31

David L ChangYuh-Guo Pan (1 patent)David L ChangAlexander C Chan (1 patent)David L ChangY G Pan (1 patent)David L ChangA C Chan (1 patent)David L ChangDavid L Chang (3 patents)Yuh-Guo PanYuh-Guo Pan (62 patents)Alexander C ChanAlexander C Chan (20 patents)Y G PanY G Pan (2 patents)A C ChanA C Chan (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Other (1 from 832,891 patents)

2. Clairol Incorporated (1 from 283 patents)

3. Reckitt & Colman Inc. (1 from 112 patents)


3 patents:

1. 5549842 - Thickened alkali metal hypochlorite composition

2. 5540738 - Oxidative hair coloring composition and process for dyeing human

3. 5139532 - P-phenylenediamine substituted by a quaternary ammonium group and an

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