Growing community of inventors

Tolland, CT, United States of America

Mark R Hapgood

Average Co-Inventor Count = 3.00

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 = 6

Mark R HapgoodIvan Semyanko (4 patents)Mark R HapgoodMilton A Fong (3 patents)Mark R HapgoodJeffrey S Mann (1 patent)Mark R HapgoodMark R Hapgood (4 patents)Ivan SemyankoIvan Semyanko (5 patents)Milton A FongMilton A Fong (5 patents)Jeffrey S MannJeffrey S Mann (5 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Combustion Engineering, Inc. (3 from 1,102 patents)


4 patents:

1. D414859 - Single-piece grate bar key for stokers feeding steam generator furnaces

2. D391633 - Multi-piece wide stoker key for stokers feeding steam generator furnaces

3. D391634 - One piece wide stoker key for stokers feeding steam generator furnaces

4. D390949 - Grate bar key for stokers feeding steam generator furnaces

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as of
1/12/2026
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