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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 |
| 6243706 | System and method for managing the creation and production of computer generated works A system and method for managing the creation and production of computer generated works permits two or more users to create a work by a collaborative process. The work, or a component of a work, to be created and/or produced is organised into a project s... | 06/05/2001 |
| 5526152 | Repeater-less multigigabit lightwave buses with optical amplifiers Apparatus is disclosed which is advantageously used in local area, metropolitan-area, and wide-area optical networks having a dual bus architecture, permitting significantly increased distance before termination or regeneration of the optical signal. A po... | 06/11/1996 |
| 5524016 | Optical emitter for amplification and process for making same A host acting as an optical emitter and a process of making the same for the ~ 1.3 μm to ~ 1.55 μm spectral region utilized in optical communications is disclosed. The host is Cr-activated willemite (Zn2 SiO4)... | 06/04/1996 |
| 5418785 | Multiple-channel token ring network with single optical fiber utilizing subcarrier multiplexing with a dedicated control channel Apparatus for and method of communicating over a local area network is disclosed. Multiple nodes are connected by an optical fiber in a ring architecture. The cable supports multiple subcarrier multiplexed data communication channels for transmitting and ... | 05/23/1995 |
| 5390043 | Compressed channel spacing for optical heterodyne communication systems In an optical heterodyne communication system for transmission of multiple optical channels at different wavelenths, the optical channels are grouped into blocks for increased utilization of the available bandwidth. The spacing between optical channels wi... | 02/14/1995 |
| 5381546 | Control process for allocating services in communications systems A process for scheduling a processor, in a stored program digital switch of a telecommunications network having heterogeneous types of task, utilizes preassigned probability parameters to schedule the tasks for the processor to serve to meet a system obje... | 01/10/1995 |
| 5344815 | Fabrication of high TC superconducting helical resonator coils A method for producing a superconducting copper oxide based helical resonator coil exhibiting improved quality factor, Q. A copper oxide based superconductor powder is mixed with a binder melt at about 45-65% solids by volume. The binder is an RCOOR' este... | 09/06/1994 |
| 5321833 | Adaptive ranking system for information retrieval An adaptive record ranking method for full text information retrieval, which quantifies the relevance of retrieved records to query terms occurring in said record. The method utilizes a multilevel weighting technique which permits user input to affect rec... | 06/14/1994 |
| 5319711 | Wireless device for verifying identification A wireless communication device using a verification protocol for verifying the identification of the wireless device by a wireless network control station in the presence of eavesdroppers is disclosed. Upon receiving a call request from a wireless device... | 06/07/1994 |
| 5301058 | Single sideband optical modulator for lightwave systems Optical communication methods and apparatus are disclosed for transmitting two or more optical signals with different optical carrier frequencies on a single optical fiber with high spectral efficiency. Each optical carrier is typically modulated with mul... | 04/05/1994 |
| 5299057 | Monolithically integrated optical amplifier and photodetector tap A semiconductor optical amplifier with a high speed photodetector acting as an optical tap is disclosed. The device functions simultaneously as an in-line optical amplifier and as a high-speed photodetector tap. An in-line an optical amplifier is combined... | 03/29/1994 |
| 5289480 | Triple-function semiconductor laser amplifier An optoelectronic device is disclosed utilizing a semiconductor laser amplifier that provides for simultaneous detection, amplification, and modulation of an input optical signal. In one embodiment, an electronic transmitter and receiver are coupled to th... | 02/22/1994 |
| 5288992 | Wide angle, narrow band optical filter A filtering system is disclosed for receiving and bandpass filtering free space optical signals. The filtering system includes a plurality of optical fibers for accepting an optical signal. The fibers are implanted in an embedding material, having an inde... | 02/22/1994 |
| 5288679 | Process for producing superconducting wires A superconducting copper oxide based wire exhibiting improved critical current density and method. A superconductor powder and a binder melt are mixed at a solids loading of at least 90% by weight. The binder is an ester wax with no more than about 0.25 w... | 02/22/1994 |
| 5278904 | Method of verifying identification A method for secure exchange of password information between a requester node and a server node using a verification protocol for confirming the identification of the requester node by the server in the presence of eavesdroppers is disclosed. By adjusting... | 01/11/1994 |
| 5276543 | Optical signal equalizer for wavelength division multiplexed optical fiber systems This invention disclosure describes the application of a polarization insensitive acoustically-tuned optical filter used in a multichannel WDM system to equalize variations in the power level of the WDM channels. The invention also describes a simple mean... | 01/04/1994 |
| 5260783 | Layered DCT video coder for packet switched ATM networks A digital video encoder encodes a video frame into a differential video frame for transmission over a packet switched network. The video encoder includes an inter-frame encoder, an intra-frame encoder, and an encoding selector for selecting between the in... | 11/09/1993 |
| 5261017 | Optical waveguide enhanced laser to fiber coupling Apparatus for improving the coupling efficiency of a laser to a single mode fiber by means of an intermediate waveguide is disclosed. For uniform waveguides maximum improvement results when waveguide's mode field radii MFR is designed as the geometrical m... | 11/09/1993 |
| 5253250 | Routing and switching of high-speed optical data with the header transmitted on a subcarrier frequency A method and apparatus is disclosed for signaling a switch of the target destination of a data packet having a header specifying the destination address and an information frame. The data packet along with a separate instance of the header is subcarrier m... | 10/12/1993 |
| 5243671 | Laser-to-fiber coupling apparatus An apparatus for coupling light from a laser chip into an unetched and uncoated optical fiber includes a substrate carrier having a V-groove extending axially through the substrate carrier. The fiber has a beveled end with an inner and outer face and is p... | 09/07/1993 |
| 5239401 | Optical modulator for cancellation of second-order intermodulation products in lightwave systems Optical communication methods and apparatus are disclosed for transmitting two or more optical signals with different optical carrier frequencies on a single optical fiber with high spectral efficiency. Each optical carrier is typically modulated with mul... | 08/24/1993 |
| 5224184 | Optical multi-chip interconnect An opto-electronic interconnect is disclosed that provides for optical communication between chip devices. Optical signals, transmitted from one of the edges of a first chip device, are directed by a lens focusing apparatus to the edge of a second chip de... | 06/29/1993 |
| 5222103 | Differential quadrature phase shift keying encoder for subcarrier systems This invention features a differential QPSK digital communications apparatus and method, suitable for optical communications systems, where a pair of synchronous binary input data streams S0 (t) and S1 (t) are encoded into a pair of ... | 06/22/1993 |
| 5214729 | Dynamic optical data buffer Apparatus for an an optical data buffer is disclosed which includes an optical splitter for splitting an incoming signal, and multiple fiber optic delay lines of varying length to delay the split signals. The delayed signals are combined and presented to ... | 05/25/1993 |
| 5194979 | Wideband optical amplifier-receiver system A semiconductor optical amplifier is utilized for optical amplification and for detection of an optical signal at the current injection electrode of the optical amplifier. A wide detection bandwidth is provided by utilizing an impedance transformer betwee... | 03/16/1993 |
| 5185756 | Wideband optical amplifier-receiver utilizing two electrode optical amplifier A semiconductor optical amplifier is utilized for optical amplification and for detection of an optical signal at the current injection electrode of the optical amplifier. A wide detection bandwidth is provided by utilizing an impedance transformer betwee... | 02/09/1993 |
| 5132822 | Optical switch An optical switch for arbitrarily polarized light having low cross-talk is made in which an input beam is split into its TE (s wave) and TM (p wave) polarization components, the TM component is converted to TE by total internal reflection, the two beams a... | 07/21/1992 |
| 5121450 | Fiber optical Y-junction A fiber optical Y-junction device includes a l×N optical fiber coupler connected to N fiber optic amplifier module structures constructed from a doped optical fiber. When the optical Y-junction structure contains a fiber optic amplifier, the fiber optica... | 06/09/1992 |
| 5119039 | Semiconductor optical amplifier with wideband electrical response A semiconductor optical amplifier includes an active region having facets at opposite ends thereof which define an optical cavity having maximum optical gain at a gain peak wavelength λpk. An antireflection coating on each of the facets has a ... | 06/02/1992 |
| 5115481 | Multi-position optical fiber rotary switch A multiple port electromechanical optical fiber switch provides for the exchange redirection of one common optical path with one of several other optical paths through the switch. It is particularly useful when one standby laser transmitter must be quickl... | 05/19/1992 |
| 5101450 | Quadrature optical phase modulators for lightwave systems Optical communication methods and apparatus are disclosed for transmitting two or more optical signals with different optical carrier frequencies on a single optical fiber with high spectral efficiency. Each optical carrier is typically modulated with mul... | 03/31/1992 |
