Paul J Leach

This inventor holds 92 USPTO granted patents and 1 published patent application, plus 3 CIPO patents and 6 EPO patents, primarily in Access Control Security (CPC class 395683). Top assignee: Microsoft Technology Licensing, LLC. Active years: 1996-2017.

USPTO Granted Patents = 92 (Patent Applications = 1)

% Patents Active = 63.0

CIPO Patents = 3

EPO Patents = 6 (Patent Applications = 4)

Average Co-Inventor Count = 4.7

ph-index = 33

Forward Citations = 5,149(Granted Patents)

Forward Citations (Not Self Cited) = 5,105(Dec 10, 2025)

Inventors with similar research interests:

Company Filing History:

92 out of 56,194

Microsoft Technology Licensing, LLC

patents

Years Active: 1996-2017

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Areas of Expertise:

Client Authentication

Access Control Lists

Resource Authorization

Cryptographic Evidence

Digital Rights Management

Delegated Authentication

Network Security

Intrusion Detection

Credential Delegation

One Time Password

Virtual Security Systems

File System Operations

92 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9819666 - Pass-thru for client authentication (2017-11-14),

2. 9407617 - Pass-thru for client authentication (2016-08-02),

3. 9253195 - Transformation of sequential access control lists utilizing certificates (2016-02-02),

4. 9208332 - Scoped resource authorization policies (2015-12-08),

5. 9118672 - Back-end constrained delegation model (2015-08-25),

6. 9058467 - Distributed computer systems with time-dependent credentials (2015-06-16),

7. 9055107 - Authentication delegation based on re-verification of cryptographic evidence (2015-06-09),

8. 9032492 - Distributed computer systems with time-dependent credentials (2015-05-12),

9. 8996866 - Unobtrusive assurance of authentic user intent (2015-03-31),

10. 8984624 - Resource access based on multiple scope levels (2015-03-17),

11. 8863291 - Reputation checking of executable programs (2014-10-14),

12. 8813170 - Testing access policies (2014-08-19),

13. 8640256 - File system operation and digital rights management (DRM) (2014-01-28),

14. 8640210 - Distributed computer systems with time-dependent credentials (2014-01-28),

15. 8627440 - PassThru for client authentication (2014-01-07),

Title: The Innovative Journey of Paul J Leach

Introduction: Paul J Leach, a talented inventor based in Seattle, WA, has made significant contributions to the field of technology with his creative and groundbreaking ideas.

Latest Patents: Paul J Leach holds several patents in various technological areas, showcasing his versatility and ingenuity in innovation.

Career Highlights: With a career spanning over two decades, Paul J Leach has consistently pushed the boundaries of technology through his inventions. His dedication to creating solutions that improve everyday life has earned him recognition in the industry.

Collaborations: Throughout his career, Paul J Leach has collaborated with leading tech companies and research institutions to bring his inventions to life. His ability to work in multidisciplinary teams has led to the successful development of cutting-edge technologies.

Conclusion: Paul J Leach's passion for innovation and his relentless pursuit of excellence have established him as a prominent figure in the world of inventors. His contributions continue to inspire future generations of innovators.