Forward Citations = 21

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3 inventors (with patents filed for the assignee):

Roy Swartz (2 out of 2 patents)

William J Mahoney (1 out of 4 patents)

Robert D Heyl (1 out of 9 patents)

4 patents: Sort by Forward Citations

1. 5009551 - Material handling system and control valve therefor (1991-04-23),

2. 4940131 - Material handling system and control valve thereof (1990-07-10),

3. 4869594 - Apparatus and method for blending particulate materials (1989-09-26),

4. 4830043 - Improvement in rotary valves (1989-05-16),

Delaware Investments, Inc. is a leading global asset management firm that offers a wide range of investment solutions to individuals, institutions, and financial advisors. With a focus on active management, Delaware Investments strives to deliver consistent, long-term performance for its clients. Through a combination of research-driven analysis and a disciplined investment process, Delaware Investments aims to meet the unique needs and objectives of its diverse client base.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

4 Patents

#579 in Wilmington, DE

#809 in Delaware

#58,999 in US

Wilmington, DE, United States of America

Delaware Investments, Inc.

Forward Citations = 21

3 inventors:

Roy Swartz (2 out of 2 patents)

William J Mahoney (1 out of 4 patents)

Robert D Heyl (1 out of 9 patents)

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