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For the Inventor, By the Inventor

Peabody, MA, United States of America

Renka Corporation


USPTO Granted Patents = 2

% Expired Patents = 100.0

Forward Citations = 5

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5 inventors (with patents filed for the assignee):

goldMedal Qiushui Chen (1 out of 10 patents)

silverMedal Ravendra Kumar Varshney (1 out of 1 patent)

bronzeMedal Ishwar Chandra Goyal (1 out of 1 patent)

4.  Bishnu Pal (1 out of 1 patent)

5.  Ajoy Ghatak (1 out of 1 patent)


2 patents:

1. 6697550 - Fast 1×N fiber-optic switch (2004-02-24),
2. 6650812 - Small residual dispersion fiber connected with a dispersion compensating fiber (2003-11-18),
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USPTO Data Jan 1 1976 - Sep 15 2026

2 Patents

#26 in Peabody, MA

#4,923 in Massachusetts

#94,628 in US

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

Renka Corporation

Forward Citations = 5

5 inventors:

goldMedal Qiushui Chen (1 out of 10 patents)

silverMedal Ravendra Kumar Varshney (1 out of 1 patent)

bronzeMedal Ishwar Chandra Goyal (1 out of 1 patent)

4.  Bishnu Pal (1 out of 1 patent)

5.  Ajoy Ghatak (1 out of 1 patent)

Please report any incorrect information to [email protected]
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