Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 4476353 | Hearing aid device to be worn in the ear In an exemplary embodiment, a first shell has the contours of an individually fitted ear adapter and the second shell has a carrier plate penetrated by openings for adjustment elements of the hearing aid structure. In known devices, the covering of the ca... | 10/09/1984 |
| 4471490 | Hearing aid A hearing aid having an earplug that is inserted wholly within the auditory canal of the ear of a user to leave the concha portion of the user's ear exposed for the collection of sound waves for transmission to a microphone as located in the outermost end... | 09/11/1984 |
| 4443668 | Earplug mounting device with audio passageway An earplug mounting device for insertion into the human ear adapted to support electronic telecommunications equipment, other audio equipment or visual aids is disclosed. A main body portion of semi-rigid resilient material is insertable into the outer ea... | 04/17/1984 |
| 4412096 | Combination earmold and receiver adapter An acoustically sealed earmold and a receiver adapter insertable into the ear of an individual with impaired hearing and used in conjunction with an external receiver to evaluate hearing. A unique method of coupling the receiver adapter to the earmold is ... | 10/25/1983 |
| 4407389 | Vented acoustic ear mold for hearing aids An acoustic ear mold insertable into the ear of an individual with impaired hearing and used in conjunction with a hearing aid having a central metal tube surrounded by a larger diameter metal tube defining a closed resonance chamber so that sound energy ... | 10/04/1983 |
| 4375016 | Vented ear tip for hearing aid and adapter coupler therefore The disclosure is directed to a vent adapter for an ear tip coupling for use with a modular "In The Ear" hearing aid. The ear tip has a bulbous distal tip portion with a sound delivering aperture and a plurality of vent apertures therein. In the assembly,... | 02/22/1983 |
| 4315111 | Hearing aid with remote momentary shut off switch A battery powered hearing aid has a remote, momentary shut off switch comprised of two leaf plates mounted in a spaced apart relationship, with each leaf plate having an electrical contact extending inwardly and aligned so that pressure against either lea... | 02/09/1982 |
| 4311206 | Hearing aid ear mold with improved discrimination An improved type of ear mold which is used with a hearing aid of conventional design, but is provided with an inner chamber, to which sound is communicated from the hearing aid through a plastic tube, and from which the sound is communicated to the inner ... | 01/19/1982 |
| 4291203 | Hearing aid device A hearing aid device including a microphone that is located in the auditory canal of the user's ear and that is retained in position therein by insertion into a molded ear plug that is received in the auditory canal, the microphone being completely embedd... | 09/22/1981 |
| 4150262 | Piezoelectric bone conductive in ear voice sounds transmitting and receiving apparatus A voice sound transmitting and receiving apparatus suitable for the use under noisy circumstances and designed to be inserted into the external auditory canal of a user for attaining the voice sound transmitting and receiving operation using the vibration... | 04/17/1979 |
| 4133984 | Plug-type hearing device A plug-type hearing device comprising a sound-leading portion being inserted into the auditory miatus, a first envelope attached around the sound-leading portion, a second envelope being positioned at the outside of the auditory miatus and being communica... | 01/09/1979 |
| 4130741 | Hearing aid reliner and apparatus for relining hearing aid ear molds For the ear mold which fits in the ear canal of the ear of a wearer of a hearing aid, a reliner to hermetically seal between the surface of the ear mold and the tissues of a wearer to eliminate feedback and wherein the coating is applied and is selected f... | 12/19/1978 |
| 3985960 | Stereophonic sound reproduction with acoustically matched receiver units effecting flat frequency response at a listener's eardrums A binaural sound recording and reproduction system which utilizes a recording mannequin equipped with an electroacoustic model of the human auditory tract to thereby record the sound pressure which would be incident on a listener's eardrum and also utiliz... | 10/12/1976 |
| 3983336 | Directional self containing ear mounted hearing aid Improved quality of sound perception and discrimination in a self-powered, ear-mounted hearing aid is accomplished by pivotally mounting the sound inlet passage for 360° rotation in a plane parallel to the ears of the wearer.... | 09/28/1976 |
