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For the Inventor, By the Inventor

Wilmington, MA, United States of America

Astex-Plasmaquest, Inc.


USPTO Granted Patents = 2

Forward Citations = 68

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2 inventors (with patents filed for the assignee):

goldMedal Frank C Doughty (2 out of 2 patents)

silverMedal John E Spencer (1 out of 15 patents)


2 patents:

1. 6225592 - Method and apparatus for launching microwave energy into a plasma processing chamber (2001-05-01),
2. 6163006 - Permanent magnet ECR plasma source with magnetic field optimization (2000-12-19),
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USPTO Data Jan 1 1976 - Sep 29 2026

2 Patents

#72 in Wilmington, MA

#4,925 in Massachusetts

#94,730 in US

Wilmington, MA (US)
Wilmington, MA, United States of America

Astex-Plasmaquest, Inc.

Forward Citations = 68

2 inventors:

goldMedal Frank C Doughty (2 out of 2 patents)

silverMedal John E Spencer (1 out of 15 patents)

Please report any incorrect information to [email protected]
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