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Forward Citations = 936

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7 inventors (with patents filed for the assignee):

Elmer V Carlson (12 out of 21 patents)

Mead C Killion (5 out of 101 patents)

Richard W Peters (3 out of 8 patents)

4. Peter L Madaffari (3 out of 3 patents)

5. August F Mostardo (2 out of 7 patents)

6. Alex V Diblick (1 out of 1 patent)

7. Martin Dippel (1 out of 1 patent)

20 patents: Sort by Forward Citations

1. 4956868 - Magnetically shielded electromagnetic acoustic transducer (1990-09-11),

2. 4867267 - Hearing aid transducer (1989-09-19),

3. 4837833 - Microphone with frequency pre-emphasis channel plate (1989-06-06),

4. 4815560 - Microphone with frequency pre-emphasis (1989-03-28),

5. 4807612 - Passive ear protector (1989-02-28),

6. 4800982 - Cleanable in-the-ear electroacoustic transducer (1989-01-31),

7. 4730283 - Acoustic transducer with improved electrode spacing (1988-03-08),

8. 4689819 - Class D hearing aid amplifier (1987-08-25),

9. 4592087 - Class D hearing aid amplifier (1986-05-27),

10. 4509193 - Miniature acoustical transducer with filter/regulator power supply (1985-04-02),

11. 4466119 - Audio loudness control system (1984-08-14),

12. 4450930 - Microphone with stepped response (1984-05-29),

13. 4272654 - Acoustic transducer of improved construction (1981-06-09),

14. 4151480 - FET Amplifier with protective circuit (1979-04-24),

15. 4149032 - Priority mixer control (1979-04-10),

Industrial Research Products, Inc. specializes in providing high-quality research equipment and products to various industries. With a focus on innovation and customer satisfaction, they offer a wide range of solutions to meet the unique needs of their clients. Their website provides detailed information on their products and services, making it easy for customers to find the right solutions for their research needs.

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USPTO Data Jan 1 1976 - Dec 9 2025

20 Patents

#12 in Elk Grove Village, IL

#807 in Illinois

#15,856 in US

#30,316 in the World

Elk Grove Village, IL, United States of America

Industrial Research Products, Inc.