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For the Inventor, By the Inventor

Inverness, IL, United States of America

Door & Window Guard Systems, Inc.


USPTO Granted Patents = 4

Trademarks = 6

Forward Citations = 16

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3 inventors (with patents filed for the assignee):

goldMedal James D Glass (3 out of 3 patents)

silverMedal William F Laubach (2 out of 8 patents)

bronzeMedal Ryan Welage (1 out of 1 patent)


4 patents:

1. 12264534 - Door guard (2025-04-01),
2. 9963929 - Assembly and method for securing a door opening or other opening of a building structure (2018-05-08),
3. 8756883 - Assembly and method for securing a door opening or other opening of a building structure (2014-06-24),
4. 8656664 - Assembly and method for securing an opening of a building structure (2014-02-25),
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USPTO Data Jan 1 1976 - Jan 6 2026

4 Patents

#1 in Inverness, IL

#2,763 in Illinois

#59,078 in US

...
Inverness, IL, United States of America

Door & Window Guard Systems, Inc.

Forward Citations = 16

3 inventors:

goldMedal James D Glass (3 out of 3 patents)

silverMedal William F Laubach (2 out of 8 patents)

bronzeMedal Ryan Welage (1 out of 1 patent)

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