Growing community of inventors

Billerica, MA, United States of America

Donald Drum

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 = 11

Donald Drum ↔ Duane B Smith (1 patent)Donald Drum ↔ Stéfane E Barbeau (1 patent)Donald DrumDonald Drum (1 patent)Duane B SmithDuane B Smith (14 patents)Stéfane E BarbeauStéfane E Barbeau (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Helen of Troy Limited (1 from 833 patents)


1 patent:

1. 7391182 - Autoilluminating rechargeable lamp system

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12/28/2025
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