For the Inventor, By the Inventor

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Wilmington, DE, United States of America

Callahan Cellular LLC

USPTO Granted Patents = 82

% Expired Patents = 52.4

EPO Patents = 40

Forward Citations = 298

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74 inventors (with patents filed for the assignee):

Raminda U Madurawe (11 out of 141 patents)

Richard Ian Olsen (7 out of 34 patents)

Darryl L Sato (7 out of 30 patents)

4. James R Gates (7 out of 33 patents)

5. Craig M Janik (6 out of 43 patents)

6. Dick Clarence Hardt (6 out of 12 patents)

7. Mike Kwon (5 out of 11 patents)

8. Craig M Hagopian (5 out of 11 patents)

9. Kazuhiko Shirai (5 out of 14 patents)

10. Bruce Borden (5 out of 9 patents)

11. Russell Brand (5 out of 8 patents)

12. Satoru Yukie (5 out of 16 patents)

13. Lars-Berno Fredriksson (4 out of 52 patents)

14. Feng-Qing Sun (4 out of 18 patents)

15. Jonathan Alan Leblang (3 out of 62 patents)

Core Competencies:

Digital Cameras

Telephony Terminal

Data Storage

Three Dimensional Integrated Circuits

Graduated Authentication

Audio Converter

Efficient Image Transmission

Network Appliance

Content Management

Automated Annotation

Vulnerability Assessment

User Interface

82 patents: Sort by Forward Citations

1. 11824869 - Graduated authentication in an identity management system (2023-11-21),

2. 11595424 - Network appliance for vulnerability assessment auditing over multiple networks (2023-02-28),

3. 11561931 - Information source agent systems and methods for distributed data storage and management using content signatures (2023-01-24),

4. 11363127 - Telephony terminal (2022-06-14),

5. 11157429 - Time and event based message transmission (2021-10-26),

6. 11025763 - Telephony terminal (2021-06-01),

7. 10911576 - Communications terminal, a system and a method for internet/network telephony (2021-02-02),

8. 10904262 - Graduated authentication in an identity management system (2021-01-26),

9. 10740546 - Automated annotation of a resource on a computer network using a network address of the resource (2020-08-11),

10. 10712999 - Audio converter device and method for using the same (2020-07-14),

11. 10694162 - Digital cameras with direct luminance and chrominance detection (2020-06-23),

12. 10631201 - Storage and playback device and method for using the same (2020-04-21),

13. 10609195 - Telephony terminal (2020-03-31),

14. 10594320 - Programmable structured arrays (2020-03-17),

15. 10579562 - Time and event based message transmission (2020-03-03),

Company Overview

Callahan Cellular LLC, based in Wilmington, DE, specializes in advanced digital imaging technologies. The company focuses on the development and innovation of digital cameras and telephony terminals, integrating cutting-edge solutions in data storage and three-dimensional integrated circuits. Their expertise extends to graduated authentication systems, audio converters, and efficient image transmission methods, positioning them at the forefront of network appliance technology. Callahan Cellular is dedicated to enhancing digital communication and imaging experiences.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

82 Patents

#71 in Wilmington, DE 19808, undefined

#86 in

#4,525 in US

#9,258 in the World

Wilmington, DE, United States of America

Callahan Cellular LLC

Forward Citations = 298

74 inventors:

Raminda U Madurawe (11 out of 141 patents)

Richard Ian Olsen (7 out of 34 patents)

Darryl L Sato (7 out of 30 patents)

4. James R Gates (7 out of 33 patents)

5. Craig M Janik (6 out of 43 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Callahan Cellular LLC. Retrieved from https://idiyas.com/company/callahan-cellular

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]

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