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For the Inventor, By the Inventor

Boulder, CO, United States of America

Friedrich R Hertrich

This inventor holds 11 USPTO granted patents. Top assignees: Digital Equipment Corporation, Other. Active years: 1976-1990.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Friedrich R Hertrich. Retrieved from https://idiyas.com/inventor/friedrich-r-hertrich

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

USPTO Granted Patents = 11

% Patents Active = 100.0

Average Co-Inventor Count = 1.1

ph-index = 10

Forward Citations = 280(Granted Patents)


Company Filing History:

goldMedal10 out of 2,297 
 
Digital Equipment Corporation
 patents
silverMedal1 out of 834,570 
Other
 patents

Years Active: 1976-1990

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11 patents (USPTO):Explore Patents
1. 4908826 - Stored data error correction system (1990-03-13),
2. 4874975 - Brushless DC motor (1989-10-17),
3. 4809110 - Narrow contour head assembly (1989-02-28),
4. 4788465 - Armature for DC motor (1988-11-29),
5. 4720913 - Mechanism for joining tape leaders (1988-01-26),
6. 4662049 - Mechanism for joining tape leaders (1987-05-05),
7. 4572460 - Means for pulling tape from a reel (1986-02-25),
8. 4390912 - Transducer positioning system and data disk therefor (1983-06-28),
9. 4260914 - Differential linear velocity transducer (1981-04-07),
10. 4208679 - Transducer positioning system for rotating disk drive units (1980-06-17),
11. 3956736 - Disc cartridge sector formatting arrangement and record addressing system (1976-05-11),

Title: The Innovations of Friedrich R. Hertrich

Introduction

Friedrich R. Hertrich is a notable inventor based in Boulder, Colorado, with a remarkable portfolio of 11 patents. His contributions to technology have significantly impacted various fields, particularly in data storage and motor design.

Latest Patents

Among his latest innovations is a stored data error correction system. This system utilizes a multi-track digital recording medium where data blocks on different tracks are algebraically combined to generate an error correction code (ECC). This ECC is stored in a designated block on one of the tracks, effectively reducing unrecoverable errors caused by horizontal and vertical clustering of dropouts on magnetic tape. Another significant patent is for a brushless DC motor. This motor features a unique design where the number of armature poles is neither a multiple nor a submultiple of the number of field poles. This design results in a relatively high cogging-ripple frequency, enhancing the motor's performance.

Career Highlights

Friedrich has worked with prominent companies, including Digital Equipment Corporation. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking technologies.

Collaborations

Throughout his career, Friedrich has collaborated with talented individuals such as Slobodan R. Perera and James O. Jacques. These partnerships have fostered innovation and creativity in his projects.

Conclusion

Friedrich R. Hertrich's contributions to technology through his patents and collaborations highlight his role as a significant inventor in the field. His work continues to influence advancements in data storage and motor technology.

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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