Forward Citations = 88

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4 inventors (with patents filed for the assignee):

Harold E Koeln (3 out of 4 patents)

Alan E Sherman (1 out of 12 patents)

Robert L Isenmann (1 out of 1 patent)

4. Walter W Paige, Jr (1 out of 1 patent)

4 patents: Sort by Forward Citations

1. 4257713 - Conical pen (1981-03-24),

2. 4217712 - Conical pen (1980-08-19),

3. 4161374 - Twist retractable writing implement (1979-07-17),

4. 3979934 - Separable key holder (1976-09-14),

Penn Corporation is a leading provider of industrial machinery and equipment. With over 50 years of experience, we offer a wide range of products and solutions to meet the needs of our clients. Our dedicated team of experts ensures quality and efficiency in all aspects of production. Visit our website to learn more about our services and how we can help you achieve your business goals.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

4 Patents

#119 in Princeton, NJ

#2,176 in New Jersey

#58,991 in US

Princeton, NJ, United States of America

Penn Corporation

Forward Citations = 88

4 inventors:

Harold E Koeln (3 out of 4 patents)

Alan E Sherman (1 out of 12 patents)

Robert L Isenmann (1 out of 1 patent)

4. Walter W Paige, Jr (1 out of 1 patent)

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