Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7182055 | Remote car starter shielding apparatus An improved remote car starter shielding apparatus consisting of a hard, durable, quadrangular convexly shaped shielding component with a plurality of holes in it near the top edge thereof through which a key-ring component, also affixable to a remote car starter un... | 02/27/2007 |
| 7005983 | Methods and apparatus for detecting refrigerator door openings A detection apparatus for detecting refrigerator door openings is coupled to at least one switch configured to be activated by a door opening. When the door is opened, the switch is activated and inputs a signal to the detection apparatus. The detection apparatus re... | 02/28/2006 |
| 4806911 | Key-ring-mountable alarm device A key-ring-mountable portable alarm device has a battery operated audible alarm and a triggering means having multiple modes of operation. The triggering means provides for momentary operation of the alarm, continuous operation of the alarm and reset of t... | 02/21/1989 |
| 4704504 | Pinching deactivator for automobile electric switches A deactivator for an automobile electric switch having a depressable, spring button projecting from a sleeve which extends through an opening provided in an automobile door frame and a nut mounted on the sleeve. The deactivator includes a pair of resilien... | 11/03/1987 |
| 4636596 | Power switch for a battery A power switch for a battery is disclosed, which includes a battery-receiving chamber having anodic and cathodic contacts for the battery, an aperture provided centrally in the anodic contact, and a switching mechanism having a protrusion which is movable... | 01/13/1987 |
| 4493975 | Hang-up hair dryer An electric appliance safety system including a hand-held appliance, a power input for receiving electric current, a two-pole switch for activating the appliance, a power cord connecting the appliance with the switch and a pair of manually operable contro... | 01/15/1985 |
| 4205305 | Burglar alarm A burglar alarm provided with a housing which contains a bell assembly and a battery compartment connected in series with a switch assembly having a linearly movable element which can be displaced a predetermined threshold distance by a chain extending to... | 05/27/1980 |
| 3996434 | Household freezer door alarm switch having an automatic resetting deactivator A household freezer alarm system has a door alarm switch having a holding element that is movable to a position for releasably maintaining an actuating plunger of the switch at a deactivated position. At the deactivated position, the freezer can be cleane... | 12/07/1976 |
| 3971009 | Key release type burglar alarm A switching device for a burglar alarm includes an electrically conductive cylindrical ring-like housing and an electrically conductive contact element inserted into said housing and resiliently held against the contact housing to form a closed circuit. A... | 07/20/1976 |
| 3968337 | Door-actuated alarm switch An alarm switch adapted to be mounted on the wall above a door on the side of the wall toward which the door swings open, having an electrically conductive arm adapted to be set in a position for actuation by the door, when the door swings, to swing inwar... | 07/06/1976 |
