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% Expired Patents = 78.6

Forward Citations = 185

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6 inventors (with patents filed for the assignee):

Steven R Hilliard (13 out of 14 patents)

Geoffrey W Hilliard (7 out of 8 patents)

Geoffrey Yerem (4 out of 6 patents)

4. Michael J Roberts (2 out of 4 patents)

5. Stephen R Hilliard (1 out of 1 patent)

6. Lawrence P Leibowitz (1 out of 1 patent)

14 patents: Sort by Forward Citations

1. 6999886 - Vehicle speed estimation using inductive vehicle detection systems (2006-02-14),

2. 6988052 - Normalization of inductive vehicle detector outputs (2006-01-17),

3. 6917308 - Surface-mount traffic sensors (2005-07-12),

4. 6911829 - Inductive signature measurement circuit (2005-06-28),

5. 6876949 - Normalization of inductive vehicle detector outputs (2005-04-05),

6. 6838886 - Method and apparatus for measuring inductance (2005-01-04),

7. 6803859 - Method and apparatus for active isolation in inductive loop detectors (2004-10-12),

8. 6771064 - Inductive sensor apparatus and method for deploying (2004-08-03),

9. 6639521 - Inductive sensor and method of use (2003-10-28),

10. 6611210 - Automotive vehicle classification and identification by inductive signature (2003-08-26),

11. 6590400 - Inductive signature measurement circuit (2003-07-08),

12. 6380868 - Permeability-modulated carrier referencing (2002-04-30),

13. 6342845 - Automotive vehicle classification and identification by inductive signature (2002-01-29),

14. 6337602 - Method and apparatus for active isolation in inductive loop detectors (2002-01-08),

Inductive Signature Technologies, Inc. is a technology company based in Knoxville, TN, specializing in advanced sensing and measurement solutions. The organization focuses on developing innovative technologies that enhance the performance and reliability of various systems through precise signal processing and data analysis. Their expertise spans multiple domains, including industrial automation and automotive applications, where they aim to improve operational efficiency and safety through cutting-edge technological advancements.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

14 Patents

#17 in Knoxville, TN

#230 in Tennessee

#22,302 in US

#42,199 in the World

Knoxville, TN, United States of America

Inductive Signature Technologies, Inc.