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For the Inventor, By the Inventor

Crespieres, France

Jean Ledieu

This inventor holds 7 USPTO granted patents. Top assignees: Digipress, O.d.m.e. International B.v.. Active years: 1992-2003.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Jean Ledieu. Retrieved from https://idiyas.com/inventor/jean-ledieu

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

USPTO Granted Patents = 7

% Patents Active = 85.7

Average Co-Inventor Count = 1.3

ph-index = 3

Forward Citations = 26(Granted Patents)


Company Filing History:

goldMedal6 out of 6 
 
Digipress
 patents
silverMedal1 out of 11 
 
O.d.m.e. International B.v.
 patents

Years Active: 1992-2003

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7 patents (USPTO):Explore Patents
1. 6620480 - Pre-engraved substrate for magnetic, magneto-optical, or phase transition optical disc (2003-09-16),
2. 5770238 - Master disk for making dies for pressing in particular optical disks (1998-06-23),
3. 5763002 - Methods of manufacture of master disk for making a die for pressing (1998-06-09),
4. 5671205 - Compact disc comprising an antipiracy marking and method of providing (1997-09-23),
5. 5622815 - Process of manufacture of a master disk and/or of an optical disk (1997-04-22),
6. 5312718 - Method of manufacturing dies for pressing optical disks (1994-05-17),
7. 5166014 - Method for the manufacture of an optically readable disc, and discs (1992-11-24),

Title: The Innovative Contributions of Jean Ledieu

Introduction

Jean Ledieu is a notable inventor based in Crespieres, France, recognized for his significant contributions to the field of optical disc technology. With a total of seven patents to his name, Ledieu has made advancements that have impacted the way data is stored and accessed in modern computing.

Latest Patents

Among his latest patents is the invention of a pre-engraved substrate for magnetic, magneto-optical, or phase transition optical discs. This invention focuses on a substrate that allows for memory discs to be recordable through various constraints. The substrate features a support with a surface film made of a reflecting material, which provides optical polish. It also includes a recordable film that contains microgrooves and pits, representing a pre-formatting signal. This technology is particularly useful in the production of optical discs used in computers.

Another significant patent by Ledieu involves the creation of master disks for producing dies specifically for pressing optical discs. These master disks consist of a support that carries microcups, which represent the information to be duplicated. The materials used for these disks include hard, conducting materials that reflect in the near-infrared range, such as zirconium, hafnium, or titanium nitride. This innovation enhances the efficiency of optical disc production.

Career Highlights

Throughout his career, Jean Ledieu has worked with various companies, including Digipress and O.D.M.E. International B.V. His experience in these organizations has contributed to his expertise in optical disc technology and manufacturing processes.

Collaborations

Ledieu has collaborated with notable individuals in his field, including Jean-Francois Dufresne. These partnerships have fostered innovation and the development of new technologies in optical storage.

Conclusion

Jean Ledieu's contributions to optical disc technology through his patents and collaborations highlight his role as a significant inventor in the field. His work continues to influence the way data is stored and accessed in modern computing.

Profile summary based on public USPTO records.
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]
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