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3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7468482 | Piano sound source apparatus, method and program for piano sound synthesis Disclosed is a piano sound source apparatus for adding a piano sound source providing a plurality of sinusoidal oscillation frequencies and a noise source providing a plurality of noise oscillation frequencies to output a composite tone. The apparatus includes an os... | 12/23/2008 |
| 7361826 | Portable electronic musical keyboard instrument A portable electronic musical device has a keyboard disposed in a housing connected to a strap and a support plate connected thereto for suspension of housing by strap on shoulders of a person while housing is simultaneously supported on waist of person to allow per... | 04/22/2008 |
| 7176374 | Music synthesizer and a method of generating a synthesizer output with a constant beat Prior art synthesizers often select a small interval d to detune. For example, if the nominal oscillator frequency was 1000 Hz, then applying a detune parameter of 10 cent would result in a detuned oscillator frequency of 1006 Hz. However, at the next octave, the no... | 02/13/2007 |
| 6974902 | Music synthesizer and a method of generating a synthesizer output with a constant beat Prior art synthesizers often select a small interval d to detune. For example, if the nominal oscillator frequency was 1000 Hz, then applying a detune parameter of 10 cent would result in a detuned oscillator frequency of 1006 Hz. However, at the next octave, the no... | 12/13/2005 |
| 6806413 | Oscillator providing waveform having dynamically continuously variable waveshape An oscillator for digital music synthesis that provides a smooth waveform that is rich in harmonic content and whose shape is continuously and dynamically variable over a wide range of harmonically rich shapes. The oscillator is efficient in that it generates the sh... | 10/19/2004 |
| 6242682 | Component mount and components for musical instruments A mount by which a component is non-destructively mounted on a musical instrument includes a receptacle and one or more abutment members, such as resilient clips, which do not screw into the instrument but engage the instrument to hold the mount on the in... | 06/05/2001 |
| 5121667 | Electronic musical instrument with multiple voices responsive to mutually exclusive ram memory segments A multi-channel musical instrument/computer comprising a mass memory device connected to a plurality of random access memory divisions, each random access memory division connected to an oscillator bank to produce musical sounds from multiple sources simu... | 06/16/1992 |
| 5020101 | Musicians telephone interface A musicians telephone interface that interconnects an instant location through a telephone line to a remote location such device having inputs to receive the sound from musical instruments and/or vocalization at each location with balancing circuitry and ... | 05/28/1991 |
| 4932304 | Control device for the manual playing of electronic musical instruments A manually played control device mounted on the playing board of an electronic keyboard instrument, to be played by one hand of a player while the other hand plays the main keys. The main keys produce usual control signals whereas the control device produ... | 06/12/1990 |
| 4919031 | Electronic stringed instrument of the type for controlling musical tones in response to string vibration When picking of a string is performed, the vibration of the string is detected accurately and quickly. When a fret operation position is changed during generation of a musical tone caused by the string picking, the pitch of the musical tone is changed to ... | 04/24/1990 |
| 4680479 | Method of and apparatus for providing pulse trains whose frequency is variable in small increments and whose period, at each frequency, is substantially constant from pulse to pulse A pulse generator for outputting a train of electric pulses with a controllably constant period (i.e., the reciprocal of pulse rate) between pulses of the pulse train. The generator includes electrical circuitry which produces an internal train of pulses ... | 07/14/1987 |
| 4475427 | Frequency independent ramp generator A tone generator for an electronic musical instrument is operable for producing a highly stable tone signal over an extended frequency range. The tone generator comprises a timing circuit defining first and second time intervals occurring in respective ti... | 10/09/1984 |
| 4462297 | Electronic metronome A trigger-type oscillator circuit, which can be adjusted to a predetermined frequency, is connected to a circuit for generating audible and/or visual bips at the predetermined frequency. A pedal-type synchronized triggering remote control unit is connecte... | 07/31/1984 |
| 4214501 | Musical composer instrument and electronic player (electronic composer) This invention relates to electric or electronic musical instruments for the production of audible musical composition ranging from quite simple to very complex arrangements. More particularly this invention is a device for the creation and editing of a m... | 07/29/1980 |
| 4207792 | Tri-state encoding circuit for electronic musical instrument A tri-state encoding circuit for use with an electronic musical instrument encodes one of three possible states of a device such as a switch, utilizing only a single input line from that device. The tri-state encoding circuit includes, in the case of a si... | 06/17/1980 |
| 4196651 | Non-redundant generator unlocking An electronic organ or the like is provided with a plurality of frequency generators greatly less than the number of keys on the organ. Each generator is capable of producing an electrical oscillation of proper frequency for any musical note on the organ ... | 04/08/1980 |
| 4191932 | Voltage-controlled oscillator A voltage-controlled type oscillator utilizing charging and discharging of a capacitor. The oscillation frequency is made to vary in exact proportion to the control voltage by variably controlling electric charge in accordance with the control voltage dur... | 03/04/1980 |
| 4182209 | Waveform generator A waveform generator used for electronic musical instruments comprising a resistance device having a plurality of power source electrodes and a plurality of potential detecting electrodes. Electric current is supplied to the power source electrodes and po... | 01/08/1980 |
| 4101885 | Musical chime device An electronic musical chime device for doors and clocks. The musical chime device includes a printed board circuit or a melody circuit board or musical card having electrical contact areas arranged in a sequential manner corresponding to the musical score... | 07/18/1978 |
| 4062013 | Non-linear type digital-to-analog converter A non-linear type digital-to-analog converter comprising a decoder, control switching circuits controlled respectively by the outputs of the decoder, and an exponential function generating circuit whose analog outputs are selectively produced by the opera... | 12/06/1977 |
| 4000489 | Dual-mode waveform generator The disclosed circuit provides a signal generator which is particularly adapted for use as an audible "kilo-sonic" game device in which a plurality of switches are provided so that the different combinations of switch positions produce a corresponding num... | 12/28/1976 |
| 3941024 | Electrical musical instrument with automatic sequential tone generation An electronic organ includes digital circuitry for automatically enabling in a sequential manner a plurality of gates to pass tone control signals to keyers which generate corresponding tone output signals. The digital circuitry includes a tone counter wh... | 03/02/1976 |
