For the Inventor, By the Inventor

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Mukwonago, WI, United States of America

Empire Level Mfg. Corp.

USPTO Granted Patents = 33

% Expired Patents = 6.1

CIPO Patents = 1

EPO Patents = 4

Trademarks = 2

Forward Citations = 374

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13 inventors (with patents filed for the assignee):

Charles D Kim (12 out of 21 patents)

Randall J Wright (8 out of 16 patents)

John R Christianson (8 out of 25 patents)

4. Joseph B Coel (7 out of 8 patents)

5. Robert J Kram (3 out of 5 patents)

6. Roger D Stanford (3 out of 3 patents)

7. Richard S Woods (2 out of 3 patents)

8. Thomas P Foran (2 out of 2 patents)

9. Robert A Hickey (2 out of 2 patents)

10. Steven Wayne Bockmann (1 out of 11 patents)

11. Roger A Bohman (1 out of 3 patents)

12. Thomas A Lindner (1 out of 4 patents)

13. Gary T Macklin (1 out of 1 patent)

33 patents: Sort by Forward Citations

1. D723954 - Angular indicator tool (2015-03-10),

2. 8745885 - Box level (2014-06-10),

3. 8413342 - Level with a magnet-mounting structure (2013-04-09),

4. 8375591 - Box level (2013-02-19),

5. 8291605 - Box level (2012-10-23),

6. 8291604 - Box level (2012-10-23),

7. 8011109 - Casing mount for a cylindrical vial (2011-09-06),

8. 7908753 - Hands-free level (2011-03-22),

9. D628914 - Torpedo level (2010-12-14),

10. 7228637 - Impact-absorbing end caps for levels (2007-06-12),

11. 7219808 - Display rack for levels (2007-05-22),

12. D537000 - Level with a convex frame expanse (2007-02-20),

13. 7150107 - Structure and method for holding and protecting vials in levels (2006-12-19),

14. D526224 - Profile of a level (2006-08-08),

15. 7086167 - Overmolded vial for use with a level (2006-08-08),

Empire Level Mfg. Corp. is a premier manufacturer of advanced measuring tools for professionals and DIYers. With over 100 years of experience, Empire Level is known for its high-quality, durable products that make measurement tasks easier and more accurate. From levels and squares to laser measuring tools, Empire Level offers a wide range of innovative solutions for all types of construction and carpentry projects.

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

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USPTO Data Jan 1 1976 - Sep 29 2026

33 Patents

#1 in Mukwonago, WI

#246 in Wisconsin

#10,288 in US

#20,112 in the World

Mukwonago, WI, United States of America

Empire Level Mfg. Corp.

Forward Citations = 374

13 inventors:

Charles D Kim (12 out of 21 patents)

Randall J Wright (8 out of 16 patents)

John R Christianson (8 out of 25 patents)

4. Joseph B Coel (7 out of 8 patents)

5. Robert J Kram (3 out of 5 patents)

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