Growing community of inventors

Royal Oak, MI, United States of America

David E Armstrong

Average Co-Inventor Count = 1.67

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 = 43

David E ArmstrongGraham S Foulkes (1 patent)David E ArmstrongTerence J O'Sullivan (1 patent)David E ArmstrongGeorge W Mould (1 patent)David E ArmstrongDavid E Armstrong (2 patents)Graham S FoulkesGraham S Foulkes (7 patents)Terence J O'SullivanTerence J O'Sullivan (1 patent)George W MouldGeorge W Mould (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Gm Global Technolgoy Operations, Inc. (2 from 31,024 patents)


2 patents:

1. 4856848 - Manual headrest

2. 4264390 - Method and apparatus for making pipe sections in materials

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as of
12/31/2025
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