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North Swanzey, NH, United States of America

George H Sparhawk, Jr

Average Co-Inventor Count = 2.00

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 = 5

George H Sparhawk, JrAndrew G Perra, Jr (1 patent)George H Sparhawk, JrGeorge H Sparhawk, Jr (1 patent)Andrew G Perra, JrAndrew G Perra, Jr (4 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Markem Corporation (1 from 71 patents)


1 patent:

1. 4314503 - Stencil printing

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12/17/2025
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