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For the Inventor, By the Inventor

Villa Park, IL, United States of America

Mark T Fondrk

This inventor holds 6 USPTO granted patents. Top assignee: Zenith Electronics Corporation. Active years: 1992-2000.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Mark T Fondrk. Retrieved from https://idiyas.com/inventor/mark-t-fondrk

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

USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 1.5

ph-index = 3

Forward Citations = 33(Granted Patents)


Location History:

  • Chicago, IL (US) (1992 - 1993)
  • Villa Park, IL (US) (1993 - 2000)

Company Filing History:

goldMedal6 out of 948 
 
Zenith Electronics Corporation
 patents

Years Active: 1992-2000

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6 patents (USPTO):Explore Patents
1. 6018217 - CRT funnel with compliant corners and CRT envelope incorporating same (2000-01-25),
2. 5355051 - CRT bulb having a front panel with a higher CTE than its funnel (1994-10-11),
3. 5258688 - CRI funnel with concave diagonals (1993-11-02),
4. 5248914 - In process tension mask CRT panel with peripheral bodies (1993-09-28),
5. 5240447 - Flat tension mask front panel CRT bulb with reduced front seal area (1993-08-31),
6. 5127865 - Peripheral bodies for tension mask CRT panel (1992-07-07),

Title: Innovations of Mark T Fondrk

Introduction

Mark T Fondrk is a notable inventor based in Villa Park, IL (US). He has made significant contributions to the field of cathode ray tube (CRT) technology. With a total of 6 patents to his name, Fondrk has developed innovative solutions that enhance the manufacturing process of CRTs.

Latest Patents

Among his latest patents are two groundbreaking inventions. The first is a CRT funnel with compliant corners, which allows for accelerated thermal upshock rates during the exhaust cycle of a CRT envelope. This innovation addresses panel-fracturing stresses generated in the funnel-to-panel seal area corners, thereby improving CRT throughput during manufacturing. The second patent involves a CRT bulb that features a front panel with a higher coefficient of thermal expansion than its funnel. This design favorably stresses the bulb in the funnel-to-panel seal area, resulting in a stronger bulb while utilizing a thinner front panel.

Career Highlights

Fondrk has spent a significant portion of his career at Zenith Electronics Corporation, where he has been instrumental in advancing CRT technology. His work has not only improved manufacturing efficiency but has also contributed to the overall performance of CRTs in various applications.

Collaborations

Throughout his career, Fondrk has collaborated with esteemed colleagues such as Raymond G Capek and James R Fendley. These partnerships have fostered a creative environment that has led to numerous innovations in the field.

Conclusion

Mark T Fondrk's contributions to CRT technology exemplify the impact of innovative thinking in engineering. His patents reflect a commitment to improving manufacturing processes and product performance. His work continues to influence the industry and inspire future advancements.

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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