Inventor · disambiguated record
Douglas Jachowski
Also filed as: JACHOWSKI DOUGLAS · JACHOWSKI DOUGLAS R
21 granted patents·3 pending applications·318 citations·filing 1990–2024
94Inventor score
Files withMURATA MANUFACTURING CO12ALLEN TELECOM GROUP INC5ORION INDUSTRIES2RESONANT INC2ALLEN TELECOM INC1
Top patents by PatentIndex Score
24 records- 0195US7323955B2Narrow-band absorptive bandstop filter with multiple signal pathsUS NAVY·Filed 2005·Granted Jan 29, 2008·42 cites·25 claims
- 0290US8305164B1Frequency-agile frequency-selective variable attenuatorJACHOWSKI DOUGLAS R·Filed 2010·Granted Nov 6, 2012·17 cites·7 claims
- 0388US11329626B2Bandpass filter with improved upper band edge sharpnessRESONANT INC·Filed 2019·Granted May 10, 2022·4 cites·8 claims
- 0486US5410284AFolded multiple bandpass filter with various couplingsALLEN TELECOM GROUP INC·Filed 1992·Granted Apr 25, 1995·43 cites·31 claims
- 0582US12375062B2Transversely-excited film bulk acoustic resonator filters with sub-resonators having different mark and pitchMURATA MANUFACTURING CO·Filed 2024·Granted Jul 29, 2025·0 cites·20 claims
- 0681US5191304ABandstop filter having symmetrically altered or compensated quarter wavelength transmission line sectionsORION INDUSTRIES·Filed 1991·Granted Mar 2, 1993·35 cites·44 claims
- 0780US11323094B2Resonator circuit using an inverter to adjust anti-resonance frequencyRESONANT INC·Filed 2019·Granted May 3, 2022·2 cites·21 claims
- 0880US5428325ARF filters and multiplexers with resonator decouplersALLEN TELECOM GROUP INC·Filed 1993·Granted Jun 27, 1995·39 cites·13 claims
- 0980US5065119ANarrow-band, bandstop filterORION INDUSTRIES·Filed 1990·Granted Nov 12, 1991·34 cites·22 claims
- 1077US5446729ACompact, low-intermodulation multiplexer employing interdigital filtersALLEN TELECOM GROUP INC·Filed 1993·Granted Aug 29, 1995·50 cites·13 claims
- 1174US5495216AApparatus for providing desired coupling in dual-mode dielectric resonator filtersALLEN TELECOM GROUP INC·Filed 1994·Granted Feb 27, 1996·29 cites·17 claims
- 1273US12028049B2Transversely-excited film bulk acoustic resonator filters with sub-resonators having different mark and pitchMURATA MANUFACTURING CO·Filed 2021·Granted Jul 2, 2024·0 cites·18 claims
- 1371US12308824B2Resonator circuit using an inverter to adjust anti-resonance frequencyMURATA MANUFACTURING CO·Filed 2022·Granted May 20, 2025·0 cites·18 claims
- 1471US12206389B2Bandpass filter with improved upper band edge sharpnessMURATA MANUFACTURING CO·Filed 2022·Granted Jan 21, 2025·0 cites·19 claims
- 1567US5576674AOptimum, multiple signal path, multiple-mode filters and method for making sameALLEN TELECOM GROUP INC·Filed 1995·Granted Nov 19, 1996·19 cites·28 claims
- 1665US12255625B2Filter using transversely-excited film bulk acoustic resonators with inductively coupled sub-resonatorsMURATA MANUFACTURING CO·Filed 2021·Granted Mar 18, 2025·0 cites·16 claims
- 1763US12451865B2Acoustic wave deviceMURATA MANUFACTURING CO·Filed 2023·Granted Oct 21, 2025·0 cites·20 claims
- 1863US12119805B2Substrate processing and membrane release of transversely-excited film bulk acoustic resonator using a sacrificial tubMURATA MANUFACTURING CO·Filed 2021·Granted Oct 15, 2024·0 cites·20 claims
- 1957US2024195384A1Multiple membrane thickness wafers using layer transfer acoustic resonators and method of manufacturing sameMURATA MANUFACTURING CO·Filed 2023·Application pending·0 cites
- 2054US12463619B2Filter deviceMURATA MANUFACTURING CO·Filed 2022·Granted Nov 4, 2025·0 cites·19 claims
- 2154US2023283256A1Filter with multiple resonators having different passivation thickness distributionsMURATA MANUFACTURING CO·Filed 2023·Application pending·0 cites
- 2253US2023231534A1TRANSVERSELY-EXCITED FILM BULK ACOUSTIC RESONATORS WITH COUNTER CHIRPED INTERDIGITAL TRANSDUCERS (IDTs) FOR MECHANICAL AND PROCESS COMPENSATIONMURATA MANUFACTURING CO·Filed 2022·Application pending·0 cites
- 2351US12021496B2Resonators with different membrane thicknesses on the same dieMURATA MANUFACTURING CO·Filed 2020·Granted Jun 25, 2024·0 cites·18 claims
- 2438US5798676ADual-mode dielectric resonator bandstop filterALLEN TELECOM INC·Filed 1996·Granted Aug 25, 1998·4 cites·43 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →