Nagel; Martin J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Nagel; Martin J..The latest application filed is for "two-way speaker with transformer-coupled split coil".
- Nagel; Martin J. - Russell Township Geauga County
- Nagel; Martin J. - Northfield Center OH
| Patent | Date |
|---|---|
| Two-way speaker with transformer-coupled split coil Grant 4,220,832 - Nagel September 2, 1 | 1980-09-02 |
| Plural concentric moving coil speaker with push-pull voltage follower direct coupling Grant 4,201,886 - Nagel May 6, 1 | 1980-05-06 |
| Aural-visual product display Grant 4,142,216 - Goss , et al. February 27, 1 | 1979-02-27 |
| Split-coil speaker with direct coupling Grant 4,130,725 - Nagel December 19, 1 | 1978-12-19 |
| Aural-visual product display Grant 3,983,550 - Goss , et al. September 28, 1 | 1976-09-28 |
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