% Expired Patents = 25.0

Forward Citations = 49

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2 inventors (with patents filed for the assignee):

Michael W Kondratuk (7 out of 30 patents)

John K Berkseth (3 out of 3 patents)

8 patents: Sort by Forward Citations

1. 8307495 - Door cylinder (2012-11-13),

2. 7871112 - Reversible double deadbolt mortise latch (2011-01-18),

3. 7703815 - Quick cam latch mechanism (2010-04-27),

4. 7607704 - Push-pull latch bolt mechanism (2009-10-27),

5. 7354081 - Single bolt mortise lock (2008-04-08),

6. 7134699 - Locking rotary latch (2006-11-14),

7. 6926315 - Push pull latch bolt mechanism (2005-08-09),

8. 6739162 - Simple deadbolt assembly (2004-05-25),

Hardware Specialties, Inc. is a leading supplier of high-quality hardware products for industrial and commercial applications. With over 20 years of experience, we provide a wide range of fasteners, tools, and other specialty hardware items to meet the unique needs of our customers. Our commitment to quality and customer satisfaction sets us apart in the industry.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

8 Patents

#1 in Spooner, WI

#789 in Wisconsin

#35,865 in US

Spooner, WI, United States of America

Hardware Specialties, Inc.

Forward Citations = 49

2 inventors:

Michael W Kondratuk (7 out of 30 patents)

John K Berkseth (3 out of 3 patents)

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