Eindhoven, Netherlands

Johannes J W Kalfs

This inventor holds 1 USPTO granted patent. Top assignee: Other. Active years: 2002.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Johannes J W Kalfs. Retrieved from https://idiyas.com/inventor/johannes-j-w-kalfs

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

Calculating rank

% Patents Active = 100.0

Average Co-Inventor Count = 2.0

ph-index = 1

Forward Citations = 4(Granted Patents)


Company Filing History:

goldMedal1 out of 834,659 
Other
 patents

Years Active: 2002

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1 patent (USPTO):Explore Patents

Title: Johannes J. W. Kalfs and Magnetic Recording Technology.

Introduction

Johannes J. W. Kalfs is an inventor associated with Eindhoven, the Netherlands. His patent work concerns magnetic recording and the systems and components used to record or reproduce information.

Latest Patents

Kalfs is credited with 1 patent: “System for Recording and/or Reproducing Information, Medium for Use in the System, and Magnetic Write Head and Arrangement for Formatting the Medium.” The invention addresses a recording and reproduction system, a compatible information medium, and magnetic-head and formatting arrangements.

Career Highlights

The available information identifies Kalfs’s work through this patent and lists his company as “Other,” so no specific employer is included here.

Collaborations

Abraham Hoogendoorn is identified as a coworker associated with Kalfs.

Conclusion

Johannes J. W. Kalfs’s recorded patent contribution focuses on magnetic recording technology and the equipment and media used to store and reproduce information.

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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