Du Pont Optical Company

Calculating rank

USPTO Granted Patents = 3

Forward Citations = 31

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7 inventors (with patents filed for the assignee):

Josephus M Wijn (1 out of 7 patents)

Johannes P Van Liempd (1 out of 7 patents)

George H Johnson (1 out of 5 patents)

4. Howard E Simmons (1 out of 10 patents)

5. Horst-Christian Langowski (1 out of 3 patents)

6. Bjorn Bluthgen (1 out of 5 patents)

7. Gerhard F Eggers (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 5587979 - Information carrier having information packets containing coded text or (1996-12-24),

2. 5380419 - Cathode-sputtering apparatus comprising a device for measuring critical (1995-01-10),

3. 5214632 - Method of manufacturing a matrix and a master plate suitable for use in (1993-05-25),

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USPTO Data Jan 1 1976 - Oct 27 2026

3 Patents

#8 in Nieuwegein

#1,673 in Netherlands

Nieuwegein, Netherlands

Du Pont Optical Company

Forward Citations = 31

7 inventors:

Josephus M Wijn (1 out of 7 patents)

Johannes P Van Liempd (1 out of 7 patents)

George H Johnson (1 out of 5 patents)

4. Howard E Simmons (1 out of 10 patents)

5. Horst-Christian Langowski (1 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Du Pont Optical Company. Retrieved from https://idiyas.com/company/du-pont-optical-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]