For the Inventor, By the Inventor

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Minneapolis, MN, United States of America

Optical Storage International

USPTO Granted Patents = 3

Forward Citations = 155

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5 inventors (with patents filed for the assignee):

Johannes J Verboom (1 out of 33 patents)

P Guy Howard (1 out of 1 patent)

Roeland M Hekker (1 out of 1 patent)

4. Roger R Bracht (1 out of 6 patents)

5. Keith R Fritze (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 4606016 - Write protection and data detection using differential detector (1986-08-12),

2. 4584686 - Reed-Solomon error correction apparatus (1986-04-22),

3. 4541689 - Friction wedge alignment system for laser diode collimator pens (1985-09-17),

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USPTO Data Jan 1 1976 - Jan 6 2026

3 Patents

#421 in Minneapolis, MN

#1,948 in Minnesota

#72,066 in US

Minneapolis, MN, United States of America

Optical Storage International

Forward Citations = 155

5 inventors:

Johannes J Verboom (1 out of 33 patents)

P Guy Howard (1 out of 1 patent)

Roeland M Hekker (1 out of 1 patent)

4. Roger R Bracht (1 out of 6 patents)

5. Keith R Fritze (1 out of 1 patent)

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