Famous Patents
The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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| Number | Title | Issue Date |
| 6912329 | Fiber color detector method and apparatus A fiber color detector is presented. A magnifying glass and a receptacle are formed in a housing. In addition, a platform including a first side facing the magnifying glass and a second oppositely disposed side is located within the housing. A light source located w... | 06/28/2005 |
| 6557286 | Stereo slide mount A stereo slide mount system that can reproduce an accurate stereo effect to facilitate a mounting operation and accurate positioning. The stereo slide mount has curved lateral ends facilitation insertion in a slide mount holder. A set of plural types of s... | 05/06/2003 |
| 5790216 | Viewing apparatus and work station Viewing apparatus including a transparency viewing apparatus (18, 19) and an electronic data display (58) unit mounted, preferably side-by-side in a housing.... | 08/04/1998 |
| 5769684 | Compact low-cost portable slide presentation toy A low-cost compact slide presentation toy offering combined slide projector and viewer function by integrating a slide projector section and a slide viewer section with a single housing. Both sections share a common slide recieving slot so that simulatane... | 06/23/1998 |
| 5692818 | Film viewer A film viewer into which is loaded a cartridge which has a spool for taking up a film, a door provided at a film entrance/exit, and an engagement shaft for opening and closing the door, the film viewer being used to view a film which is wound on the spool... | 12/02/1997 |
| 5572814 | Hand-held microfilm readers A hand-held microfilm reader comprises an elongate body formed by two parts connected together at one end and separated at the other ends to form a slot. A microfilm sheet can be inserted in the slot with a translucent screen being provided to one side of... | 11/12/1996 |
| 4991935 | Magnifying device for hand-held video display apparatus and the like A magnifying device for use with a hand-held video display apparatus or the like having a generally rectangular housing and a video display visually observable from externally of the housing. The magnifying device includes a frame adapted for releasable m... | 02/12/1991 |
| 4897802 | Method and apparatus for preparing and displaying visual displays A display system having a single-frame transparency which contains four independent images, each of the images having spaced apart groups of pixels interlaced with the groups of pixels from each of the other images, each of the images being selectable for... | 01/30/1990 |
| 4685231 | Photographic disc viewer The viewer includes a main body defining a horizontal opening within which a photographic disc is rotatably supported. A light source below the horizontal opening projects the viewed image onto a magnifier lens located above the opening. A viewing port re... | 08/11/1987 |
| 4648189 | Laminated medical data card An internally-illuminated medical data card in a credit card format containing a summary of the medical history of the bearer germane to his existing medical condition. The card, which is of laminated construction, includes a plastic core panel having lig... | 03/10/1987 |
| 4550515 | X-Ray and photographic viewer A portable transparency viewer including a body having a fixed imaging screen with a light source disposed therebehind within the viewer body. Also held within the viewer body is a selectively energizable power source for illuminating the imaging screen. ... | 11/05/1985 |
| 4491434 | Handheld viewer for transparency film A compact, handheld viewer adapted for use with photographic transparencies which are located within a film cassette in roll form, in a strip containing a plurality of individual scenes, or individually mounted transparencies. The viewer includes a manual... | 01/01/1985 |
| 4454669 | X-Ray and photographic viewer A portable, easy to use photographic viewer for use particularly by medical and dental professionals when required. The viewer is light weight and includes a light source, a photographic imaging screen, clip to retain the photographic slides or negatives ... | 06/19/1984 |
| 4389803 | Slide viewer or projector A slide viewer or projector is provided with a device for preventing two or more slides from attempting to enter into the viewing or projecting area simultaneously. The device comprises a barrier with a wiper pivotally mounted thereon. The barrier and wip... | 06/28/1983 |
| 4372068 | Rechargeable transparent slide viewer apparatus Apparatus for viewing a transparency includes a rechargeable battery and a telescoping lens housing which moves inwardly and outwardly with respect to a housing in which is disposed the rechargeable battery, a light source, and a solid diffuser/reflector ... | 02/08/1983 |
| 4257180 | Microfiche viewer A portable microfiche viewer is provided for viewing a selected image frame of a microfiche arranged in a cylindrical configuration. The viewer comprises a cylindrical translucent outer wall, a cylindrical transparent inner wall positioned within the oute... | 03/24/1981 |
| 4250644 | Hand held microfilm reader A hand held microfilm reader wherein the film is maintained within the reader housing and the controls for positioning the film are easily manipulated by one hand. An optical system provides an intense automatically focused image projected onto a screen f... | 02/17/1981 |
| 4234244 | Portable microfilm viewer A portable microfilm viewer for viewing a microfilm contained in a cassette. The viewer includes a housing with a lens system mounted therein. The cassette is removably received on a film transport mechanism which both supports and drives the film. A sour... | 11/18/1980 |
| 4213254 | Astronomical optical simulator An astronomical optical simulator made of a tubular body with an eyepiece at one end and a light source at the other with a slot in the tubular member to receive an opaque disk having openings distributed to simulate an array of astronomical bodies. The o... | 07/22/1980 |
| 4081920 | Film viewer A film viewer wherein a housing is provided with a viewing window, a film holder is removably positionable in the housing spaced from the window, and illuminating means provided in the housing for passing light through the film holder to the window.... | 04/04/1978 |
| 4060929 | Toy detective set A toy detective set for the amusement of children includes a casing for housing various detective play items. The casing is formed from two identical and mating casing halves which can be separated and expose the play items. The set also includes a flashl... | 12/06/1977 |
| 4059351 | Hand-held film projectors A hand-held projector for projecting from a transparency on a film strip and image onto any desired surface. The film strip with a series of transparencies is guided in a casing which has a front peripheral wall portion carrying an objective behind which ... | 11/22/1977 |
| 4034540 | Portable dual spool microfilm reading device A portable dual spool cassette type microfilm reading device capable of storing a large quantity of microphotographic information in a relatively small space. The cassette contains a band of microfilm having information frames disposed in rows and columns... | 07/12/1977 |
| 4031641 | Combined container and viewer package for film transparencies A compact container and viewer for processed film transparencies. The combined unit is a mailable package which can be readily converted to a slide viewer by removing all but a single selected slide from the package. The latter may also function as a stor... | 06/28/1977 |
| 3967401 | Viewer with movably mounted slide holder A compact slim line viewer for slides employing a slide holder which is pivoted outwardly of the periphery of the viewer by the slide to viewing position and retractable into the periphery of the viewer when not in use.... | 07/06/1976 |
