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For the Inventor, By the Inventor

Minnetonka, MN, United States of America

Robert A Johnson

This inventor holds 6 USPTO granted patents. Top assignees: Control Data Corporation, Magnetic Peripherals Inc.. Active years: 1976-1985.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Robert A Johnson. Retrieved from https://idiyas.com/inventor/robert-a-johnson-x9yxnt6u

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

USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 2.3

ph-index = 4

Forward Citations = 38(Granted Patents)


Company Filing History:

goldMedal3 out of 210 
 
Control Data Corporation
 patents
silverMedal3 out of 175 
 
Magnetic Peripherals Inc.
 patents

Years Active: 1976-1985

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6 patents (USPTO):Explore Patents
1. 4536270 - Apparatus and method for shielding magnetic heads during a sputtering (1985-08-20),
2. 4297781 - Method of aligning a precision grinding wheel assembly (1981-11-03),
3. 4279102 - Method of manufacturing narrow track ferrite head cores (1981-07-21),
4. 4236355 - Precision grinding wheel mount (1980-12-02),
5. 4006525 - Method of machining vise jaw face (1977-02-08),
6. 3951395 - Resilient vise jaw (1976-04-20),

Title: The Innovations of Robert A Johnson

Introduction

Robert A Johnson is a notable inventor based in Minnetonka, MN (US), recognized for his contributions to the field of magnetic data transducers. With a total of six patents to his name, Johnson has made significant advancements in technology that enhance the performance and efficiency of magnetic heads.

Latest Patents

Among his latest patents is an innovative apparatus and method for shielding magnetic heads during sputtering. This invention addresses the manufacturing process of ferrite cores used in magnetic data transducer heads. By utilizing a novel stacking technique, the bars from which core pieces are cut can mutually shield each other's back gap areas during the alumina sputtering step. This method effectively sets the lengths of the read/write flux gaps, and an inexpensive fixture supports the bars in the desired position during the sputtering operation. Another significant patent is the method of aligning a precision grinding wheel assembly. This apparatus allows for the mounting of a thin flexible grinding wheel, enabling accurate cutting of kerfs. The patent also discloses a method for the precision assembly of the apparatus.

Career Highlights

Throughout his career, Robert A Johnson has worked with prominent companies such as Control Data Corporation and Magnetic Peripherals Inc. His work in these organizations has contributed to the development of advanced technologies in the field of data processing and magnetic storage.

Collaborations

Johnson has collaborated with notable individuals in his field, including Douglas J Hennenfent and Allan L Holmstrand. These collaborations have likely fostered innovation and the exchange of ideas, further enhancing the impact of his work.

Conclusion

Robert A Johnson's contributions to the field of magnetic data transducers through his patents and career achievements highlight his role as a significant inventor. His innovative approaches continue to influence technology in meaningful ways.

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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