Inventor · disambiguated record
Donald H. Mcmahon
Also filed as: MCMAHON DONALD H
47 granted patents·2,552 citations·filing 1974–1992
99Inventor score
Top patents by PatentIndex Score
47 records- 0198US5119454ABulk optic wavelength division multiplexerPOLAROID CORP·Filed 1988·Granted Jun 2, 1992·190 cites·22 claims
- 0298US3968476ASpurious signal removal in optical processor fingerprint identification apparatusSPERRY RAND CORP·Filed 1974·Granted Jul 6, 1976·134 cites·5 claims
- 0397US4516837AElectro-optical switch for unpolarized optical signalsSPERRY CORP·Filed 1983·Granted May 14, 1985·180 cites·20 claims
- 0497US4278327ALiquid crystal matricesSPERRY CORP·Filed 1979·Granted Jul 14, 1981·108 cites·39 claims
- 0596US4432599AFiber optic differential sensorSPERRY CORP·Filed 1981·Granted Feb 21, 1984·69 cites·7 claims
- 0696US4293188AFiber optic small displacement sensorSPERRY CORP·Filed 1980·Granted Oct 6, 1981·109 cites·37 claims
- 0796US4208651AFingerprint identification by ridge angle and minutiae recognitionSPERRY CORP·Filed 1978·Granted Jun 17, 1980·79 cites·17 claims
- 0896US4201442ALiquid crystal switching coupler matrixSPERRY CORP·Filed 1978·Granted May 6, 1980·96 cites·12 claims
- 0996US3968475ADigital processor for extracting data from a binary imageSPERRY RAND CORP·Filed 1974·Granted Jul 6, 1976·76 cites·7 claims
- 1095US4461543AElectro optic switchSPERRY CORP·Filed 1982·Granted Jul 24, 1984·107 cites·6 claims
- 1194US4152723AMethod of inspecting circuit boards and apparatus thereforSPERRY RAND CORP·Filed 1977·Granted May 1, 1979·69 cites·15 claims
- 1292US4695121AIntegrated optic resonant structres and fabrication methodPOLAROID CORP·Filed 1985·Granted Sep 22, 1987·93 cites·20 claims
- 1392US4291976ADigital fiber optic position sensorSPERRY CORP·Filed 1980·Granted Sep 29, 1981·46 cites·7 claims
- 1492US4175827AElectro-optical multiplexer having multiple frequency resonant excitationSPERRY RAND CORP·Filed 1978·Granted Nov 27, 1979·53 cites·20 claims
- 1592US4021097ADistributive tee couplerSPERRY RAND CORP·Filed 1976·Granted May 3, 1977·68 cites·9 claims
- 1691US3975711AReal time fingerprint recording terminalSPERRY RAND CORP·Filed 1974·Granted Aug 17, 1976·208 cites·8 claims
- 1787US5208692AHigh bandwidth network based on wavelength division multiplexingDIGITAL EQUIPMENT CORP·Filed 1991·Granted May 4, 1993·77 cites·19 claims
- 1886US4715027AIntegrated optic multi/demultiplexerPOLAROID CORP·Filed 1986·Granted Dec 22, 1987·56 cites·13 claims
- 1984US4736360ABulk optic echelon multi/demultiplexerPOLAROID CORP·Filed 1986·Granted Apr 5, 1988·47 cites·28 claims
- 2084US4099875ACoaxial multi-detector system and method for measuring the extinction coefficient of an atmospheric scattering mediumSPERRY RAND CORP·Filed 1977·Granted Jul 11, 1978·37 cites·16 claims
- 2183US4130342APassive optical channel crossover, switch and bend structureSPERRY RAND CORP·Filed 1977·Granted Dec 19, 1978·39 cites·25 claims
- 2282US4300122AApparatus for processing digital data representative of a two-dimensional imageSPERRY CORP·Filed 1979·Granted Nov 10, 1981·26 cites·14 claims
- 2380US4519252APressure and temperature compensated photoelastic hydrophoneSPERRY CORP·Filed 1983·Granted May 28, 1985·31 cites·17 claims
- 2479US5144304AData and forward error control coding techniques for digital signalsDIGITAL EQUIPMENT CORP·Filed 1991·Granted Sep 1, 1992·82 cites·26 claims
- 2577US4421384AFiber optic transducerSPERRY CORP·Filed 1981·Granted Dec 20, 1983·36 cites·7 claims
- 2677US4302835AMultiple terminal passive multiplexing apparatusSPERRY CORP·Filed 1980·Granted Nov 24, 1981·28 cites·8 claims
- 2776US4107518AOptical repeaterSPERRY RAND CORP·Filed 1977·Granted Aug 15, 1978·26 cites·45 claims
- 2875US5396239AData and forward error control coding techniques for digital signalsDIGITAL EQUIPMENT CORP·Filed 1992·Granted Mar 7, 1995·67 cites·23 claims
- 2975US4181399AOptical internal reflectance switchable couplerSPERRY RAND CORP·Filed 1978·Granted Jan 1, 1980·26 cites·6 claims
- 3073US4742576AOptical communication system employing coherent detection and methodPOLAROID CORP·Filed 1985·Granted May 3, 1988·41 cites·43 claims
- 3172US4182544AResonant multiplexer-demultiplexer for optical data communication systemsSPERRY RAND CORP·Filed 1978·Granted Jan 8, 1980·19 cites·25 claims
- 3271US4960989AOptical time domain reflectometer having a receiver with selectively controlled gainPHOTON KINETICS INC·Filed 1989·Granted Oct 2, 1990·27 cites·13 claims
- 3371US4595830AMultimode optical fiber accelerometerSPERRY CORP·Filed 1983·Granted Jun 17, 1986·19 cites·49 claims
- 3470US5043975AHigh bandwidth network based on wavelength division multiplexingDIGITAL EQUIPMENT CORP·Filed 1989·Granted Aug 27, 1991·29 cites·38 claims
- 3567US4782492AThermally controllable optical devices and systemPOLAROID CORP·Filed 1986·Granted Nov 1, 1988·27 cites·11 claims
- 3667US4518857ATemperature and pressure compensated elasto-optic sensorSPERRY CORP·Filed 1983·Granted May 21, 1985·18 cites·10 claims
- 3762US4094579AMultimode optical waveguide device with non-normal butt coupling of fiber to electro-optic planar waveguideSPERRY RAND CORP·Filed 1976·Granted Jun 13, 1978·17 cites·9 claims
- 3861US4707061AOptical communication system employing frequency referencePOLAROID CORP·Filed 1985·Granted Nov 17, 1987·20 cites·31 claims
- 3960US4730301AWavelength multiplexed optical communications system and methodPOLAROID CORP·Filed 1985·Granted Mar 8, 1988·22 cites·22 claims
- 4058US4156555AApparatus and method for providing unblurred images with a continuously scanned light beamSPERRY RAND CORP·Filed 1977·Granted May 29, 1979·10 cites·8 claims
- 4152US4160237AOptical reader for multiline image processingSPERRY RAND CORP·Filed 1978·Granted Jul 3, 1979·8 cites·20 claims
- 4247US4265509AHigh speed holographic optical printing systemSPERRY CORP·Filed 1979·Granted May 5, 1981·6 cites·5 claims
- 4346US4715028AOptical communication systemPOLAROID CORP·Filed 1986·Granted Dec 22, 1987·12 cites·42 claims
- 4441US4636636AMicrowatt battery powered optical sensorSPERRY CORP·Filed 1984·Granted Jan 13, 1987·3 cites·6 claims
- 4541US4185884AFour port optical internal reflectance switchable couplerSPERRY CORP·Filed 1977·Granted Jan 29, 1980·6 cites·3 claims
- 4632US4116534AApparatus and method for high speed accessing of character imagesSPERRY RAND CORP·Filed 1977·Granted Sep 26, 1978·2 cites·26 claims
- 4730US5173951AWord oriented image smoothing apparatus and methodUNISYS CORP·Filed 1991·Granted Dec 22, 1992·3 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →