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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7247342 | Stable electroluminescent devices An electroluminescent device comprising a transparent or translucent support, a transparent or translucent first electrode, a second conductive electrode and an electroluminescent phosphor layer sandwiched between the transparent or translucent first electrode and t... | 07/24/2007 |
| 7241557 | Photopolymerizable composition A composition that is photopolymerizable upon absorption of light in the wavelength range from 300 to 450 nm, the composition comprising a binder, a polymerizable compound, a sensitizer and a photoinitiator, wherein the sensitizer is a fluorene compound that is conj... | 07/10/2007 |
| 7155100 | Flame-retardant optical fiber coating composition An optical fiber comprises a flame retardant tight-buffer coating. The tight-buffer coating has a limiting oxygen index of at least 20% and preferably has a durable tensile strength. Flame retardant, inner primary, outer primary, ink, ink base and single coatings an... | 12/26/2006 |
| 6474447 | Elevator power control for adjusting ratio of power supplied from each of dual power sources To reduce a total power amount required to drive an elevator by a commercial power supply during a peak power-consumption time period, for instance, afternoon in summer time, a control apparatus for this elevator is arranged by employing: a converter for ... | 11/05/2002 |
| 6464962 | N-alkyldiethanolamine hydrofluorides and oral hygiene compositions containing them Amine hydrofluorides of the general formula (I): R--N(CH2 CH2 OH)2.HF (I) In which R is a straight-chain hydrocarbon residue having 10 to 20 carbon atoms exhibit antibacterial and caries-prophylactic activity and can be prepa... | 10/15/2002 |
| 6459598 | Inverter device An inverter apparatus includes an inverter circuit for driving a load. This inverter circuit has at least a pair of switching elements connected in series in a forward direction between both polarity terminals of a dc supply for supplying power to a load.... | 10/01/2002 |
| 6457097 | Information processing system and recording medium recording a program to cause a computer to execute steps An information processing system which has a disk buffer for temporarily storing data items read from a disk unit, a block processing order determination module for detecting, from a processing request for requesting data items stored on the disk unit, a ... | 09/24/2002 |
| 6442475 | Extendable on-vehicle information system An on-vehicle information system includes extended function interface modules responsible for communication between basic function modules, providing basic information services in an on-vehicle information system, and extended function modules.... | 08/27/2002 |
| 6442438 | Method for controlling a decisional process when pursuing an aim in a specific field of application, such as economical, technical, organizational or similar and system for implementing the method A method for controlling a decisional process when pursuing an overall aim in a specific field of application, such as economic, technical, organisational or similar, which is automated by the placing in relation, according to rules and strategies predete... | 08/27/2002 |
| 6439348 | Elevator controller controlling charging of a battery power source with regenerative power A controller of an elevator for stably controlling regenerated power by using a cheap secondary battery of a low capacity without damaging energy saving effects obtained by charging. The controller of the elevator includes a converter for rectifying AC po... | 08/27/2002 |
| 6439347 | Elevator control apparatus controlling charging of a power source with regenerative power An elevator control apparatus includes: a converter for rectifying AC power into DC power; an inverter for converting the DC power into AC power having a variable voltage and a variable frequency; a controller for controlling a motor based on the AC power... | 08/27/2002 |
| 6435312 | Elevator speed controller responsive to power failures A controller of an elevator for smooth speed control, using a cheap power accumulating device having a low capacity, even during a power failure. The controller has a converter, an inverter, a power accumulating device arranged between DC buses, a chargin... | 08/20/2002 |
