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 |
| 7703498 | Hidden window screen A window screen assembly for a window, which is disposed in a window frame. This assembly can include a housing coupled to a window frame, at least one screen disposed in the housing window frame, and at least one lock for selectively locking the screen to the windo... | 04/27/2010 |
| 7320637 | Filter window adapter unit A filter window adapter unit adapted for use with a main split-sash window of school buses is provided. The adapter unit includes a mounting frame adapted to be installed over the main split-sash window of the school buses. An inner sash is disposed fixedly in a low... | 01/22/2008 |
| 7267696 | Composition for dyeing keratinous fibers, comprising a hydroxycarboxylic acid or a salt, ready-to-use composition comprising it, implementation process and device The present invention relates to a composition for dyeing keratin fibers, comprising, in a medium that is suitable for dyeing, a) at least one oxidation base and/or at least one direct dye, and b) at least one particular hydroxycarboxylic acid or a salt thereof. The... | 09/11/2007 |
| 7222467 | Screen with integral railing A frame assembly for at least partially enclosing a raised floor structure includes a bottom frame member positioned adjacent an associated raised floor structure. A pair of spaced apart side frame members are connected to and extend upwardly from the bottom frame m... | 05/29/2007 |
| 7082981 | Retractable pet guard The retractable pet guard has a screen or net extending retractably from a housing which is temporarily secured to either the latch edge of a door or to the latch side of a door frame. The extension edge of the net secures removably to the opposite member of the doo... | 08/01/2006 |
| 7029055 | Slidable window assembly with vent screen A window assembly for a motor vehicle includes an opening defined by a pair of spaced apart stationary windows. Above and below the opening are a pair of opposing horizontal guide rails within which a moveable window slides allowing the opening to be selectively cov... | 04/18/2006 |
| 6945305 | Screen frame reinforcement The screen frame reinforcement is an elongated plate or strip of rigid material that is attached over a conventional screen frame member to reinforce the splines so that the screen will remain firmly within the spline recess. The plate has a pair of elongated ridges... | 09/20/2005 |
| 6499527 | Screen guide and method A vertical guide for a roll-up type screen as used on windows and doors can be used either inside or outside as desired. The guide is placed in opposing relation on the left and right sides of the window or door and includes a first U-shaped retainer whic... | 12/31/2002 |
| 6470947 | Hidden window screen for sash window A hidden window screen assembly for a sash window containing a snap-on cover to conceal the rolled-up screen. The screen assembly fits into the upper and lower frame member of a conventional sash window. When the frame member is opened, the rolled-up scre... | 10/29/2002 |
| 6209610 | Retractable screen system and improvements therefor A continuous roll of screen which may be payed out from said roll by an installer or manufacturer to a required predetermined window size, or alternatively patio door size, said screen comprising a free end which allows the installer to pay the screen off... | 04/03/2001 |
| 6186215 | Multi-positional rolling window screen A rolling window screen assembly for use with a window assembly. The screen assembly is deployable in at least three positions. The first engagement position exists wherein the flexible screen may be extended over the entire window. The second engagement ... | 02/13/2001 |
| 6135186 | Window screen assembly and method A retractable window screen assembly which includes a housing easily mounted on an existing double hung sliding window sill or similar type is disclosed. The screen is wound about a spring mounted core and extends from the housing when the window is opene... | 10/24/2000 |
| 6089302 | Extensible doorway barrier A safety gate attached to a door and its associated jamb, for preventing passage through the doorway of children, pets, or the like. The gate comprises a net attached to the door and to the jamb. At the jamb, the net is attached to a spring loaded return ... | 07/18/2000 |
| 6082432 | Screen door accessory A roll-up screen door appliance for drawing a screen panel horizontally across the span of a door frame, which advantageously may be stably positioned in a partly open position for permitting persons to pass through with a minimum opening, thereby reducin... | 07/04/2000 |
| 5906421 | Safety device for inhibiting child access to a cabinet The invention disclosed herein provides a safety device for inhibiting child access to a storage space. The safety device has a length of flexible material with a first end. The device also has a material retainer for storing the flexible material and all... | 05/25/1999 |
| 5660144 | Pet barrier and method therefor The present invention is directed to an improved pet barrier. The pet barrier is preferably comprised of a net or fabric barrier, a container for retaining one end of the barrier and for housing the barrier when not in use, and hooks for attaching the sec... | 08/26/1997 |
| 5301734 | Window mechanism A window assembly is disclosed which provides for automatic raising, lowering and locking of a window unit. The assembly includes a lower window frame having threaded holes in the side members thereof and an upper window frame having a motor mounted there... | 04/12/1994 |
| 4651797 | Roll-up screen door A roll-up screen door includes a long, narrow housing having a length adapted to extend vertically for the full height of a door casement opening. The housing contains a conventional spring-biased roll upon which is initially wound a large sheet of flexib... | 03/24/1987 |
| 4359081 | Door barriers The invention is a horizontally operated door barrier which presents virtually an impenetrable doorway barrier while maintaining ease of personnel access through the portal. The invention consists of a movable vertical spool upon which is wrapped a materi... | 11/16/1982 |