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 |
| 6994765 | Method for forming images and intermediate transfer recording medium The present invention provides a method for image formation, that can yield thermally transferred images which are excellent in various fastness properties even under severe service conditions, and an intermediate transfer recording medium for use in the method for ... | 02/07/2006 |
| 5030023 | Printing device with improved bold face printing capability Disclosed is a printing device such as an electronic typewriter and a wire-dot type printer. With the disclosed printing device, control means is operated in response to depression of a character key, on condition that a bold-face print mode is being set ... | 07/09/1991 |
| 5024545 | Multi-impact character erasing apparatus with control of correction ribbon feed In a printed character printed with a printing apparatus provided with a plurality of type elements and a print hammer, the specified left or right edge portion thereof has ink adhered heavily on the paper, and this specified edge portion is difficult to ... | 06/18/1991 |
| 4854754 | Recording apparatus A recording apparatus according to the present invention records data on a member to be recorded by filling recording ink in a film having numerous minute orifices and by heating the ink rapidly with heating elements to spout ink from the orifices on the ... | 08/08/1989 |
| 4758102 | Pen-recording apparatus capable of erasing written characters A recording device capable of writing a character on a sheet of paper with a writing ball-point pen according to a set of character pattern data which is stored in a pattern memory, and erasing a written character with an erasing ball-point pen with relia... | 07/19/1988 |
| 4749289 | Printing device for attribute printing In a printer for printing an attributed character by printing a character part and an attribute part separately, the invented printer or typewriter is so constructed that only an attribute part, e.g., an underline part or a bold face part, is printed in c... | 06/07/1988 |
| 4729678 | Method and apparatus for producing characters in bold form A method and apparatus for printing characters in bold form in a typing system. As disclosed, characters entered through an input device such as a keyboard are printed on paper, placed in a display and stored in memory substantially as they are entered. A... | 03/08/1988 |
| 4692045 | Printing apparatus capable of correcting printed characters by offset prints There is disclosed a printing apparatus provided with a mechanism for erasing printed characters by actuating a type font through an erasing ribbon and a mechanism for selecting characters by rotating the type font, wherein the erasure of a printed charac... | 09/08/1987 |
| 4688956 | Carriage feed control method for bold and shadow printing Inaccurate duplication of the first and the secnd prints due to the inequality of the distance and arrangement therebetween occurs in a serial printer in which a carriage is moved parallel to a platen by a servo motor etc. The first printing in duplex pri... | 08/25/1987 |
| 4624588 | Full field MICR encoder A check encoder (11) for printing of full field MICR (Magnetic Ink Character Recognition) codes on checks, includes a check guide (19) and means for sensing the position of the check (25,27) in the check guide (19). A pair of fixed roller assemblies (29,3... | 11/25/1986 |
| 4607265 | Pen-recording apparatus A pen-recording apparatus capable of recording not only regular letters, but also special letters each of which consists of the regular letters slightly shifted relative to each other. The apparatus comprises a platen supported rotatably to hold a sheet o... | 08/19/1986 |
| 4500216 | Electronic typewriter An electronic typewriter comprises a character-bearing disk movable along the platen and a selector to space selected characters according to a plurality of constant spaces or proportional spaces. The electronic unit provides a line buffer on which the en... | 02/19/1985 |
| 4436441 | Typewriter accessory device for bold face typing Device for use with a typewriter having manual half back space lever to permit making bold face characters. When bold face typing is desired, the device is removably secured to the typewriter, adjacent to the half-space lever, to permit incremental adjust... | 03/13/1984 |
| 4405244 | Typewriter operating attachment providing for dead key operations A baseplate attachment (12) having actuator elements which extend into an electrical typewriter (13) to initiate operations in response to signals indicative of successive characters to be printed further provides for dead key print operations when desira... | 09/20/1983 |
| 4388005 | Method and apparatus for printing partially overlapping characters Plural imprints of a selected character on a record carrier medium, which imprints are close together, mutually offset and partially overlapping, are generated in an office machine printer equipped with a typing element, in order to correct misprints or p... | 06/14/1983 |
| 4320980 | Machine for typing characters Characters are typed in reverse, i.e. light characters on a dark background by first typing all over the field of the character using an ink ribbon, back spacing and typing the character using a correcting ribbon. The first typing may be effected with a s... | 03/23/1982 |
| 3945480 | Justifying, text writing reproducing machine The illustrated embodiment is a desk top justifying text writing reproducing machine, illustratively controllable by a code reading means in a desk top text writing composing machine (the topic of our copending application for "JUSTIFYING, TEXT WRITING CO... | 03/23/1976 |