For the Inventor, By the Inventor

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Cleveland, OH, United States of America

National Union Electric Corporation

USPTO Granted Patents = 48

Trademarks = 7

Forward Citations = 646

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36 inventors (with patents filed for the assignee):

Samuel E Hohulin (16 out of 28 patents)

Glenn F Zellhoefer (8 out of 8 patents)

Harold W Schaefer (8 out of 8 patents)

4. Joyce K Thomas (6 out of 42 patents)

5. Leonard Hampton (4 out of 5 patents)

6. Martin E Wiese (4 out of 8 patents)

7. Joseph F Brooks (4 out of 4 patents)

8. Arnold L Sepke (3 out of 31 patents)

9. Kenneth R Parker (3 out of 3 patents)

10. John H Zauner (2 out of 2 patents)

11. Scott N Lockhart (2 out of 2 patents)

12. Clark S Richmond (2 out of 2 patents)

13. Marco Ferrari (1 out of 4 patents)

14. William E Hanold (1 out of 6 patents)

15. John R Backlund (1 out of 1 patent)

48 patents: Sort by Forward Citations

1. 5170561 - Hub attachment for a drive shaft of a cordless grass/weed groomer trimmer (1992-12-15),

2. D315816 - Hand-held vacuum cleaner (1991-03-26),

3. D313293 - Battery powered upright vacuum cleaner (1990-12-25),

4. 4777691 - Motor driven brush assembly for vacuum cleaner (1988-10-18),

5. 4748713 - Vacuum cleaner assembly (1988-06-07),

6. 4742652 - Air restraint device for burnishing machine (1988-05-10),

7. 4701975 - Vacuum cleaner assembly (1987-10-27),

8. D290895 - Battery powered suction broom (1987-07-14),

9. 4665582 - Lightweight battery powered suction broom (1987-05-19),

10. D288971 - Hand-held vacuum cleaner with extended nozzle (1987-03-24),

11. 4648149 - Vacuum cleaner assembly (1987-03-10),

12. 4621390 - Vacuum cleaner assembly (1986-11-11),

13. D283064 - Hand-held vacuum cleaner (1986-03-18),

14. D277517 - Carpet and rug vacuum cleaner (1985-02-05),

15. D277038 - Transparent tool cover for suction cleaners or the like (1985-01-01),

National Union Electric Corporation is a leading manufacturer and supplier of electrical equipment and solutions. With over 50 years of experience in the industry, we specialize in providing high-quality products and services to various sectors including power generation, transmission, and distribution. Our wide range of offerings includes transformers, circuit breakers, switchgears, and control systems. As a customer-centric company, we strive to deliver innovative and sustainable solutions that meet the needs of our clients. Visit our website for more information and to explore our extensive product portfolio.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

48 Patents

#46 in Cleveland, OH

#298 in Ohio

#7,024 in US

#14,104 in the World

Cleveland, OH, United States of America

National Union Electric Corporation

Forward Citations = 646

36 inventors:

Samuel E Hohulin (16 out of 28 patents)

Glenn F Zellhoefer (8 out of 8 patents)

Harold W Schaefer (8 out of 8 patents)

4. Joyce K Thomas (6 out of 42 patents)

5. Leonard Hampton (4 out of 5 patents)

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