For the Inventor, By the Inventor

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Renton, WA, United States of America

Digital Control, Inc.

USPTO Granted Patents = 46

% Expired Patents = 8.7

CIPO Patents = 1

Trademarks = 27

Forward Citations = 1,708

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8 inventors (with patents filed for the assignee):

John E Mercer (44 out of 275 patents)

Rudolf Zeller (15 out of 81 patents)

Shiu Sang Ng (11 out of 31 patents)

4. Guenter W Brune (10 out of 109 patents)

5. Peter H Hambling (9 out of 20 patents)

6. Lloyd Alfred Moore (8 out of 28 patents)

7. Albert W Chau (5 out of 179 patents)

8. Donald R Parker (1 out of 1 patent)

9. Rene Betourne (1 patent)

Core Competencies:

Orientation Sensor

Positional Tracking

Boring Tool

Magnetic Locating Signal

Path Mapping

Utility Installation

Depth Measurement

Remote Locator

Composite Magnetic Signal

Thermal Protection

Antennae Arrangement

Monitoring Device

46 patents: Sort by Forward Citations

1. 6618951 - Orientation sensor utilizing intra-pattern property measurements (2003-09-16),

2. 6617854 - Tracking the positional relationship between a boring tool and one or more buried lines using a composite magnetic signal (2003-09-09),

3. 6559646 - Boring tool locating using sensing at spaced apart reference path locations (2003-05-06),

4. 6536538 - Establishing positions of locating field detectors and path mapping in underground boring tool applications (2003-03-25),

5. 6530155 - Orientation sensor utilizing intra-pattern property measurements (2003-03-11),

6. 6525538 - Position and orientation locator/monitor (2003-02-25),

7. 6496008 - Flux plane locating in an underground drilling system (2002-12-17),

8. 6457537 - Mapping tool for tracking and/or guiding an underground boring tool (2002-10-01),

9. 6454023 - Mapping tool for tracking and/or guiding an underground boring tool (2002-09-24),

10. 6446728 - Auto-extending/retracting electrically isolated conductors in a segmented drill string (2002-09-10),

11. 6417666 - Boring tool tracking system and method using magnetic locating signal and wire-in-pipe data (2002-07-09),

12. 6400159 - Orientation sensor especially suitable for use in an underground boring device (2002-06-04),

13. 6396275 - Arrangement using measured pitch and locating field measurements to determine a positional relationship (2002-05-28),

14. 6364035 - Establishing positions of locating field detectors and path mapping in underground boring tool applications (2002-04-02),

15. 6351892 - Orientation sensor utilizing intra-pattern property measurements (2002-03-05),

Company Overview

Digital Control, Inc., based in Renton, WA, specializes in advanced technologies for underground boring and positional tracking. The company focuses on developing innovative solutions such as orientation sensors and magnetic locating signals, which enhance the efficiency and accuracy of boring tool control and path mapping. Their expertise extends to field detector positioning and auto-retracting conductors, positioning them as a key player in the underground construction and utility sectors, committed to improving operational capabilities through cutting-edge technology.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

46 Patents

#5 in Renton, WA

#178 in Washington

#7,600 in US

#15,122 in the World

Renton, WA, United States of America

Digital Control, Inc.

Forward Citations = 1,708

8 inventors:

John E Mercer (44 out of 275 patents)

Rudolf Zeller (15 out of 81 patents)

Shiu Sang Ng (11 out of 31 patents)

4. Guenter W Brune (10 out of 109 patents)

5. Peter H Hambling (9 out of 20 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Digital Control, Inc.. Retrieved from https://idiyas.com/company/digital-control

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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