% Expired Patents = 25.0

Forward Citations = 49

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4 inventors (with patents filed for the assignee):

Derrell J Weldy (6 out of 7 patents)

Michael D Weldy (4 out of 5 patents)

Lewis J Hein (4 out of 4 patents)

4. Daniel Grant Ericson (2 out of 29 patents)

8 patents: Sort by Forward Citations

1. 7534620 - Method and device for monitoring platelet function (2009-05-19),

2. 7309607 - Method and device for monitoring platelet function (2007-12-18),

3. 7111811 - Hopper stand (2006-09-26),

4. 6907908 - Hopper apparatus and method for application of joint compound to corner beads (2005-06-21),

5. D501050 - Three way; 2-90° outside, 1-135° inside, bullnose corner (2005-01-18),

6. D487520 - Three way; 2-90° outside, 1-90° inside, bullnose corner (2004-03-10),

7. D487156 - Three way; 2-90° inside, 1-135° outside, bullnose corner (2004-02-25),

8. D486920 - Three way; 1-90° outside, 2-90° inside, bullnose corner (2004-02-18),

Pla-cor Incorporated is a leading provider of high-quality custom packaging solutions. With over 30 years of experience in the industry, we specialize in the design and production of custom corrugated boxes, displays, and packaging materials for a wide range of industries. Our commitment to providing innovative and cost-effective packaging solutions has made us a trusted partner for businesses looking to enhance their brand image and protect their products during shipping and storage.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

8 Patents

#4 in Santee, CA

#8,531 in California

#35,893 in US

Santee, CA, United States of America

Pla-Cor Incorporated

Forward Citations = 49

4 inventors:

Derrell J Weldy (6 out of 7 patents)

Michael D Weldy (4 out of 5 patents)

Lewis J Hein (4 out of 4 patents)

4. Daniel Grant Ericson (2 out of 29 patents)

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