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| Number | Title | Issue Date |
| 7305992 | Conforming earplug An earplug of the type that has a stem (12) and a plurality of flanges (21–23), is constructed to be stiff enough to be easily inserted into the ear canal, and to thereafter press with minimal force against the walls of the ear canal for comfort. The... | 12/11/2007 |
| 7220372 | Dual density earplug An earplug (10) that includes a soft foam body (12) and a stiffener (14) in the body, is produced by a method that has minimum steps and that results in an earplug of attractive design and that uses a minimum of material. One method includes mol... | 05/22/2007 |
| 7210484 | Baffled earplug An earplug (10) with a body front portion (22) for insertion into a person's ear canal, has a pocket (30) to increase comfort and is constructed to enhance noise attenuation. The pocket, which allows easier compression of the body front portion ... | 05/01/2007 |
| D539415 | Flange earplug | 03/27/2007 |
| 7192544 | Earplug with molded-in stiffener Earplugs with soft foam bodies and with stiffeners in the bodies, are molded by suspending the stiffener in the body mold cavity using a pin (60) that extends into a passage (56) at the rear of the body. Each stiffener is tapered in diameter, with a re... | 03/20/2007 |
| 6820717 | Pressure regulating earplug An earplug is provided for use by an airplane passenger, which more slowly increases the pressure of air in the passenger's ear canal than the rate of increase in cabin air pressure as the airplane descends near the end of a flight. The earplug has a cavity (30 | 11/23/2004 |