Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
PatentStorm News
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 |
| 7208920 | Buck/boost power converter A buck/boost converter having an input and an output, a switching cell with a switch between the input and the output, and a selector selectively configuring the switching cell into at least two configurations from among the following: a parallel chopper configurati... | 04/24/2007 |
| 7078883 | Method and apparatus for starting power converters A startup circuit for starting a power converter for converting an input voltage to an output voltage includes a switch connected in series with a resistive element. The startup circuit is connected in parallel with a trigger switch in the power converter for enabli... | 07/18/2006 |
| 6756774 | Constant voltage source, a constant voltage source circuit board and a method for applying a constant voltage A constant voltage source includes a constant voltage supplying circuit including an operational amplifier for supplying an output voltage to a load and a feedback circuit for feeding back the output voltage to the operational amplifier; a first inductance unit disp... | 06/29/2004 |
| 6472852 | Resonant buck-type voltage converter using swinging inductance A swinging inductor is used to achieve zero-current switching in a resonant buck-type voltage converter. The swinging inductor exhibits the property of a relatively high inductance at zero current and low current, but it swings back to the original resona... | 10/29/2002 |
| 5675244 | Power-supply apparatus for powering a control circuit for controlling a power switch component Power-supply apparatus for powering a control circuit for controlling a power switch component, the apparatus powering said circuit from the voltage across the terminals of the component in the off state, and including an energy-storage capacitor, said ap... | 10/07/1997 |
| 5659464 | Filter for pulse width modulating inverter A filter for a pulse width modulating inverter comprises a first inductor coupled to a phase connection of the pulse width modulating inverter, a second inductor coupled between the first inductor at a first-second coupling junction and a load, and a seri... | 08/19/1997 |
| 4786854 | Alternating current voltage regulator using a feedback loop with step filtering An AC voltage regulator includes an output voltage sensing and regulating device having a suitable filter characteristic to attenuate AC components therein occurring in the frequency ranges corresponding to the almost periodic oscillations or abnormal osc... | 11/22/1988 |
| 4532582 | Voltage regulator system using magnetic controllers A voltage regulator system for receiving relatively high frequency electrical energy from a source and providing a regulated relatively low frequency electrical energy output wherein a passive device sensing means comprising only electrically passive elem... | 07/30/1985 |
| 4058761 | Saturated reactors A saturated reactor of the type, for example the treble-tripler reactor, in which groups of 3-phase windings are connected in series to produce multiple flux phases in respective core limbs to achieve harmonic compensation. The windings are connected betw... | 11/15/1977 |
