Roger K Loper

This inventor holds 9 USPTO granted patents. Top assignees: Rockwell International Corporation, Rockwell International Coproration. Active years: 1983-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Roger K Loper. Retrieved from https://idiyas.com/inventor/roger-k-loper

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

USPTO Granted Patents = 9

% Patents Active = 100.0

Average Co-Inventor Count = 1.2

ph-index = 9

Forward Citations = 527(Granted Patents)

Location History:

Norway, IA (US) (1983 - 1987)
Marion, IA (US) (1992 - 1997)

Company Filing History:

8 out of 3,430

Rockwell International Corporation

patents

1 out of 1

Rockwell International Coproration

patent

Years Active: 1983-1997

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9 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5604929 - System for correcting quadrature gain and phase errors in a direct (1997-02-18),

2. 5339040 - AM demodulation receiver using digital signal processor (1994-08-16),

3. 5249203 - Phase and gain error control system for use in an I/Q direct conversion (1993-09-28),

4. 5230099 - System for controlling phase and gain errors in an I/Q direct conversion (1993-07-20),

5. 5179730 - Selectivity system for a direct conversion receiver (1993-01-12),

6. 5095536 - Direct conversion receiver with tri-phase architecture (1992-03-10),

7. 5095533 - Automatic gain control system for a direct conversion receiver (1992-03-10),

8. 4682123 - Digital voice and data frequency modulation circuit (1987-07-21),

9. 4387334 - Battery monitor circuit (1983-06-07),

Title: The Innovative Contributions of Roger K Loper

Introduction

Roger K Loper is a notable inventor based in Marion, Iowa, with a remarkable portfolio of nine patents. His work primarily focuses on advancements in signal processing and communication technologies. Loper's inventions have significantly contributed to the field, particularly in improving the performance of radio receivers.

Latest Patents

Among his latest patents, Loper has developed a system for correcting quadrature gain and phase errors in direct conversion receivers. This innovative system addresses gain and phase errors by treating them as resident in the Q channel, employing an iterative process to generate intermediary signals. These signals incorporate a trigonometric product of the IF signal and the I and Q signal components, producing correction factors that maintain a matched quadrature relationship between the two signal channels. Another notable patent is his AM demodulation receiver using a digital signal processor. This receiver compensates for carrier energy removed by a capacitive coupling circuit, converting the received AM signal into I and Q component signals. The digital signal processor processes these signals to enhance the receiver's performance.

Career Highlights

Loper has had a distinguished career, working with prominent companies such as Rockwell International Corporation. His experience in these organizations has allowed him to refine his skills and contribute to significant technological advancements in the industry.

Collaborations

Throughout his career, Loper has collaborated with esteemed colleagues, including Ernest J Moes and Thomas R Hope. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.

Conclusion

Roger K Loper's contributions to the field of signal processing and communication technologies are noteworthy. His innovative patents and collaborations reflect his commitment to advancing technology and improving communication systems.

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]