Industrial Research Products, Inc.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Industrial Research Products, Inc..The latest application filed is for "magnetically shielded electromagnetic acoustic transducer".
- Industrial Research Products, Inc. - Elk Grove Village IL
- Industrial Research Products, Inc. - Elk Grove Villiage IL
- Industrial Research Products, Inc. - Elk Grove IL
| Patent | Date |
|---|---|
| Magnetically shielded electromagnetic acoustic transducer Grant 4,956,868 - Carlson September 11, 1 | 1990-09-11 |
| Microphone with frequency pre-emphasis channel plate Grant 4,837,833 - Madaffari June 6, 1 | 1989-06-06 |
| Microphone with frequency pre-emphasis Grant 4,815,560 - Madaffari March 28, 1 | 1989-03-28 |
| Passive ear protector Grant 4,807,612 - Carlson February 28, 1 | 1989-02-28 |
| Cleanable in-the-ear electroacoustic transducer Grant 4,800,982 - Carlson January 31, 1 | 1989-01-31 |
| Acoustic transducer with improved electrode spacing Grant 4,730,283 - Carlson , et al. March 8, 1 | 1988-03-08 |
| Class D hearing aid amplifier Grant 4,689,819 - Killion August 25, 1 | 1987-08-25 |
| Class D hearing aid amplifier Grant 4,592,087 - Killion May 27, 1 | 1986-05-27 |
| Audio loudness control system Grant 4,466,119 - Peters , et al. August 14, 1 | 1984-08-14 |
| Microphone with stepped response Grant 4,450,930 - Killion May 29, 1 | 1984-05-29 |
| Acoustic transducer of improved construction Grant 4,272,654 - Carlson June 9, 1 | 1981-06-09 |
| Priority mixer control Grant 4,149,032 - Peters April 10, 1 | 1979-04-10 |
| Acoustic transducer with improved electret assembly Grant 4,063,050 - Carlson , et al. December 13, 1 | 1977-12-13 |
| Audio system with enhanced spatial effect Grant 4,063,034 - Peters December 13, 1 | 1977-12-13 |
| Transducer with improved armature and yoke construction Grant 3,935,398 - Carlson , et al. January 27, 1 | 1976-01-27 |
| Damping element Grant 3,930,560 - Carlson , et al. January 6, 1 | 1976-01-06 |
| Delta Modulator Having Low-level Random Noise Characteristic Grant 3,855,555 - Burkhard , et al. December 17, 1 | 1974-12-17 |
| Microphone Assembly Operable In Directional And Non-directional Modes Grant 3,835,263 - Killion September 10, 1 | 1974-09-10 |
| Backplate Construction For Electret Transducer Grant 3,772,133 - Schmitt November 13, 1 | 1973-11-13 |
| Hearing Aid System Grant 3,770,911 - Knowles , et al. November 6, 1 | 1973-11-06 |
| Electroacoustic Transducer Grant 3,766,332 - Carlson , et al. October 16, 1 | 1973-10-16 |
| Diaphragm Assembly For Electret Transducer Grant 3,740,496 - Carlson , et al. June 19, 1 | 1973-06-19 |
| Shock Isolation Mounts For Fragile Devices Grant 3,692,264 - Burkhard , et al. September 19, 1 | 1972-09-19 |
| Digital Delay System For Audio Signal Processing Grant 3,681,531 - Burkhard , et al. August 1, 1 | 1972-08-01 |
| System For Frequency Modification Of Speech And Other Audio Signals Grant 3,681,756 - Burkhard , et al. August 1, 1 | 1972-08-01 |
| Acceleration Insensitive Transducer Grant 3,577,020 - Carlson , et al. May 4, 1 | 1971-05-04 |
| Transducer Having An Armature Arm Split Along Its Length Grant 3,560,667 - Carlson February 2, 1 | 1971-02-02 |
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