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For the Inventor, By the Inventor

Newport Beach, CA, United States of America

Keratron Group


USPTO Granted Patents = 2

Forward Citations = 72

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2 inventors (with patents filed for the assignee):

goldMedal Mark E Steen (2 out of 39 patents)

silverMedal Ken T Cheng (2 out of 2 patents)


2 patents:

1. 5447517 - Apparatus and method of calibrating a surgical knife (1995-09-05),
2. 5323543 - Apparatus and method for calibrating a surgical knife (1994-06-28),
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USPTO Data Jan 1 1976 - Sep 29 2026

2 Patents

#148 in Newport Beach, CA

#20,981 in California

#94,730 in US

Newport Beach, CA (US)
Newport Beach, CA, United States of America

Keratron Group

Forward Citations = 72

2 inventors:

goldMedal Mark E Steen (2 out of 39 patents)

silverMedal Ken T Cheng (2 out of 2 patents)

Please report any incorrect information to [email protected]
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