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Placentia, CA, United States of America

Donald K Murphy

Average Co-Inventor Count = 3.00

ph-index = 3

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 = 99

Donald K MurphyWilliam S Griffin (3 patents)Donald K MurphyRoss D Olney (3 patents)Donald K MurphyDonald K Murphy (3 patents)William S GriffinWilliam S Griffin (12 patents)Ross D OlneyRoss D Olney (12 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Hughes Electronics Corporation (2 from 1,334 patents)

2. Hughes Aircraft Company (1 from 4,197 patents)


3 patents:

1. 5941692 - Tuned resonant oscillating mass inflation pump and method of extracting

2. 5934882 - Electrical generator system having a tuned resonant oscillating mass

3. 5707215 - Tuned resonant oscillating mass inflation pump and method of extracting

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as of
12/12/2025
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