Forward Citations = 43

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5 inventors (with patents filed for the assignee):

William A Lawrence (2 out of 3 patents)

Glen A Rued (2 out of 3 patents)

Elmer J Simpson (2 out of 3 patents)

4. Robert J Whelchel (1 out of 1 patent)

5. Robert J Welchel (1 out of 1 patent)

5 patents: Sort by Forward Citations

1. 4368805 - Hydraulic control unit for elevators (1983-01-18),

2. 4345507 - Elevator fluid flow control valve (1982-08-24),

3. 4311212 - Valve control system (1982-01-19),

4. 4194534 - Pressure and temperature compensating hydraulic valve (1980-03-25),

5. 4011888 - Unitary elevator up level control valve (1977-03-15),

Company Overview

Elevator Equipment Co. is a leading provider of high-quality elevator products and services. With over 50 years of experience in the industry, we specialize in the design, manufacturing, installation, and maintenance of elevators, escalators, and moving walkways. Our team of skilled professionals is dedicated to delivering safe and reliable vertical transportation solutions for commercial, residential, and industrial buildings. Visit our website to learn more about our comprehensive range of elevator equipment and services.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

5 Patents

#377 in Los Angeles, CA

#12,073 in California

#51,644 in US

Los Angeles, CA, United States of America

Elevator Equipment Co.

Forward Citations = 43

5 inventors:

William A Lawrence (2 out of 3 patents)

Glen A Rued (2 out of 3 patents)

Elmer J Simpson (2 out of 3 patents)

4. Robert J Whelchel (1 out of 1 patent)

5. Robert J Welchel (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Elevator Equipment Co.. Retrieved from https://idiyas.com/company/elevator-equipment-company

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]