William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6345782 | Printer and control method for the same A printer in which a cover to the roll paper holder in which roll paper is held can be easily opened even when such problems as a roll paper jam occur. Opening and closing a cover (30) to the roll paper loading mechanism (2) of the printer is detected by ... | 02/12/2002 |
| 4820069 | Sheet-feeding apparatus with selectable unit feed and coefficient therefor The present invention relates to a printing apparatus such as a typewriter which prints data from an inputting means on a printing medium. In the case of the normal printing apparatus, a feed amount setting means is installed which sets the amount of feed of l... | 04/11/1989 |
| 4569611 | Typewriter with automatic paper loading apparatus An automatic paper loading apparatus for a typewriter provided with a platen, feed rolls, and a paper bail. The paper loading apparatus essentially includes a paper alignment member pivotally mounted on a frame, a paper guide carried by a movable carriage... | 02/11/1986 |
| 4480931 | Electronic typewriter An electronic typewriter which provides for significant simplification of machine operations. The typewriter includes automatic error correcting function associated with electronic controls and a memory. A series of text data which have been deleted durin... | 11/06/1984 |
| 4462709 | Type carrier return and platen line space device for typewriters A carriage return device in a typewriter including: an interposer operable through operation of a key lever for the carriage return; a cycle bail driven by the interposer; a driving source adapted to rotate a main shaft by a predetermined number of rotati... | 07/31/1984 |
| 4273456 | Paper insertion apparatus for a typewriter Paper insertion apparatus for indexing a typewriter to a desired first line printing position is triggered using a position detector cooperating with an operator movable paper hold-down bail. When the paper bail is moved to a withdrawn position relative t... | 06/16/1981 |
| 4272205 | Signal controlled indexing rate shifter for a typewriter An indexing mechanism for a typewriter provides a signal controlled transfer to a fast paper advance rate, say for semi-automatic paper insertion, while storing the last operator-selected rate. Two cams are employed which influence, through a follower, th... | 06/09/1981 |
| 4266880 | Paper insertion apparatus Improved apparatus for effecting semi-automatic insertion of paper into a typewriter concentrates operator interactions, (1) to condition the typewriter for a distance input selection and (2) to trigger indexing for paper insertion, so as to merely involv... | 05/12/1981 |
| 4120593 | Line-spacing system for printing office machines A printing office machine of the type having a carriage, a controllable line spacing mechanism and a controllable carriage return mechanism for returning the carriage to the beginning of the printing line with a manually actuatable control actuated by a f... | 10/17/1978 |
| 3945482 | Orthogonal input keyboards Orthogonal ten-finger keyboards are disclosed for typewriters, computer terminals, and other devices processing alphanumeric information that maximize entry rates and stroking accuracy--and minimize finger motions and the time needed to master the keyboar... | 03/23/1976 |