William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 6052464 | Telephone set having a microphone for receiving or an earpiece for generating an acoustic signal via a keypad A telephone set (10) comprises a first housing (12), a second housing (14), a rotate (54) or a slide (34) mechanism, a microphone (16), an earpiece (18) and a keypad (20). The rotate (54) or the slide (34) mechanism couples the first housing (12) to the s... | 04/18/2000 |
| 6044152 | Shielded keyboard for a portable communication device The present invention provides an improved keyboard for a cellular telephone or the like. The improved keyboard includes an additional shielding layer which is added to the keypad to prevent RF leakage in the direction of the user. The shielding layer inc... | 03/28/2000 |
| 6038313 | Double sided keyboard for a telephone A portable telephone has a hinged flap with a keyboard on each side of the flap, allowing a user to dial or punch a telephone number when the flap is in the open position or when the flap is in the closed position.... | 03/14/2000 |
| 6026283 | Electrically conductive keypad lightguides A lightguide is provided for illuminating a keypad of a radiotelephone, or other electronic device, via at least one light source located within the electronic device. Conductive pads and conductive traces are provided on a face of the lightguide. Each co... | 02/15/2000 |
| 5917906 | Touch pad with tactile feature A touch pad assembly for portable communication devices has a dual entry user interface surface and is configured to overlay a touch pad surface. The touch-pad assembly can operate in both a key entry and graphical (written) input mode via the same input ... | 06/29/1999 |
| 5901222 | User interface for portable telecommunication devices An ergonomic portable telecommunication device that can be completely operated with a depressable trackball.... | 05/04/1999 |
| 5884185 | Cordless telephone having a call key capable of performing multiple functions and a method for assigning alternate functions to the call key and performing the multiple functions A method for performing multiple functions by using a call key of a handset in a cordless telephone comprising the steps of checking whether a handset is in a standby state; if it is checked that a handset is in a standby state, opening a flip switch; inp... | 03/16/1999 |
| 5841849 | User interface for personal telecommunication devices An ergonomic personal telecommunication device that is of optimum size for user operation and manipulation allowing the user to operate the device as a telephony device or an electronic messaging device with one finger by using virtual function keys and b... | 11/24/1998 |
| 5818924 | Combined keypad and protective cover A mechanical keypad is attached to the outside of a protective cover. A switch allows a personal intelligent communicator to be operated either with the user interface of a mobile telephone handset or with a graphical user interface. When the cover is clo... | 10/06/1998 |
| 5804780 | Virtual touch screen switch A virtual touch screen switch includes a push window disposed over a display assembly. The transparent push window functions similar to a toggle switch, while enabling touch screen functionality. In a preferred arrangement, the push window is disposed in ... | 09/08/1998 |
| 5790652 | Telephone station equipment employing rewriteable display keys Telephone station equipment consisting of a phone device interconnected with a personal computer. The phone device includes a conventional telephone handset and a keypad employing pushbutton display keys each of which has a writable keyface display for vi... | 08/04/1998 |
| 5774540 | Hierarchical menu screen interface for displaying and accessing telephone terminal features A user of a telephone terminal with an interactive display is provided complete access to all feature choices in a hierarchical menu through a minimum number of menu keys. These menu keys include a "Next" key, a "Back" key, a "Select" key and a "Home" key... | 06/30/1998 |
| 5768369 | Telephone test set keypad with integrated dynamic microphone Unwanted acoustic noise and environmental degradation associated with the use of a highly sensitive microphone in a telephone test set are eliminated by a microphone-integrated keypad laminate architecture, in which a microphone is snugly captured within ... | 06/16/1998 |
| 5754645 | Electronic apparatus having keyless control The method and apparatus of the present invention permits data entry in an electronic apparatus without using a keypad. By rotating a moveable element (104), a function, letter, or number is selected. The moveable element (104) is then moved in another di... | 05/19/1998 |
| 5742912 | Portable radio telephone set A portable radio telephone set provided with a display section includes a rotary selector which turns to select various functions. A menu displayed on the display section is selected by the rotary selector during a non-conversation time, and the sound vol... | 04/21/1998 |
| 5717753 | Switching mat for a telephone or radio handset A handset for telephone and radio systems usually consists of a casing which contains a microphone, a loudspeaker, a printed circuit board carrying the electronic components, and normally also a switching mat made of a rubber type material (e.g. silicone)... | 02/10/1998 |
| 5715311 | Communication terminal apparatus A communication terminal apparatus having a speech input module arranged movable from a position adjacent to a main shell to a position distanced from the main shell for calling. The communication terminal apparatus includes a transmitter/receiver circuit... | 02/03/1998 |
| 5710576 | Portable electronic apparatus having partial display function A portable electronic device has a construction in which a first housing and a second housing are capable of being opened and closed and a display is mounted on an inner side of the first housing. A partial display area of the display is in a visible stat... | 01/20/1998 |
| 5703932 | Cellular telephone with built-in battery and antenna A cellular telephone which is compact, slim in shape and convenient for the one touch signal transmission is disclosed. On the right hand side of the front surface of a case, numeral keys of 0 through 9 are provided in a row while, on the left hand side, ... | 12/30/1997 |
| 5677949 | Telephone with minimal switches for dialing An apparatus that provides for the dialing of telephone numbers utilizing a limited number of keys such as only two keys. The apparatus provides for the creation of an internal telephone directory that includes telephone numbers and names that is also gen... | 10/14/1997 |
| 5625688 | Shower telephone A safe cordless telephone is provided for use in showers. The user-friendly cordless telephone can also be used when taking a bath or outside when it is raining. The dependable cordless comprises a special portable cordless handset with a water-resistant ... | 04/29/1997 |
| 5598469 | Keypad for a communication instrument, particularly a subscriber's instrument for telephone communication A communication instrument has a housing for containing various electrical or electronic circuits and, on an operator side, a push button paid with predetermined functions being associated with the buttons. To allow the instrument to be made with a narrow... | 01/28/1997 |
| 5450619 | Slidably retractable portable telephone apparatus In a portable telephone apparatus, the length of a housing thereof and a display area are altered between the operation and storage or non-operation states thereof, thereby improving operability thereof. In the operating state, the first display and the s... | 09/12/1995 |
| 5371790 | Telephone with resilient housing A telephone construction utilizes foam as the body material. The housing may be formed from layers of foam built up in a manner to provide a central cavity for the electromechanical components of the telephone. An upper foam surface covers the dial pushbu... | 12/06/1994 |
| 5369788 | Miniature portable radio communication apparatus A miniature portable radio communication apparatus. A single casing includes a transmitter and a display. A movable member slidably received in the casing may be pulled out, as needed, and loaded with a receiver.... | 11/29/1994 |
| 5365570 | Emergency cellular telephone apparatus Emergency radio telephone apparatus includes a housing, a radio transceiver for receiving and transmitting modulated radio signals, an actuator connected to the housing for actuating the transceiver and initiating the process of making connection to a pre... | 11/15/1994 |
| 5332322 | Ergonomic thumb-actuable keyboard for a hand-grippable device A hand-held thumb-actuated ergonomic keyboard input device for use with a coupled electronic system such as a selector on a portable telephone. The device includes a housing which incorporates a hand-grippable portion that permits the device to be held in... | 07/26/1994 |
| 5307401 | Cellular telephone with microphone extender A cellular telephone having wrap-around control keys which extend beyond the front surface of the telephone to its sides, an extended add-on microphone adapter which extends the microphone so it is positioned closer to the user's mouth and a non-slip or s... | 04/26/1994 |
| 5265158 | Construction of a stand alone portable telephone unit A stand-alone portable radio telephone unit, includes an upper part, and a lower part. The upper and lower parts have similar peripheral shapes and in combination include all of the components necessary to form a handset for connection with a main unit in... | 11/23/1993 |
| 5260998 | Folding portable telephone set A folding portable telephone set includes a plurality of sequentially articulated flat plate segments. A second flat segment is connected at one edge to an edge of a first flat segment provided with a transmitter and a switching unit by a hinge joint, a t... | 11/09/1993 |
| 5237607 | Lighted telephone dial A dial illuminating assembly allows for minimum power operation while maintaining uniformity of illumination in a telephone dial. The dial illumination assembly includes a plurality of fiber optic light guides for receiving light rays emanating from a lig... | 08/17/1993 |
| 5151946 | Variable configuration portable telephone A compact portable telephone comprises a housing having a main body and an extending sleeve-like portion mounted for longitudinal slidable movement between a retracted position when not in use (see FIG. 2), and an extended position (see FIG. 1) for use. I... | 09/29/1992 |
| 4930157 | Telephone handset having apertures for key access A handset for use with a key pad wherein the body of the handset is provided with one or more apertures which are adapted to permit access to one or more keys of the key pad when the handset is brought to a position proximate to the key pad.... | 05/29/1990 |
| 4817138 | Telephone having a handset and a rase each having a receiver and microphone The telephone comprises a handset (8) having a receiver and a microphone, and a base (2) on which the handset may be placed. According to the invention, the casing (28) of the base is fitted with another receiver and another microphone and has a shape suc... | 03/28/1989 |
| 4042793 | Telephone mouthpiece keyboard Apparatus and method for providing tone operating capability to a dial telephone is disclosed. The standard mouthpiece together with the original microphone of the dial telephone are removed. The present invention provides a replacement mouthpiece attache... | 08/16/1977 |