Douglas Jachowski
19Patents
8h-index
9Co-inventors
65Inventor score
Filing activity: Mar 2, 1990 → Mar 28, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5446729A | Compact, low-intermodulation multiplexer employing interdigital filters | Electricity | 29 | Expired |
| US5410284A | Folded multiple bandpass filter with various couplings | Electricity | 27 | Expired |
| US5191304A | Bandstop filter having symmetrically altered or compensated quarter wavelength transmission line sections | Electricity | 27 | Expired |
| US5428325A | RF filters and multiplexers with resonator decouplers | Electricity | 25 | Expired |
| US5065119A | Narrow-band, bandstop filter | Electricity | 25 | Expired |
| US7323955B2 | Narrow-band absorptive bandstop filter with multiple signal paths | Electricity | 19 | Expired |
| US5495216A | Apparatus for providing desired coupling in dual-mode dielectric resonator filters | Electricity | 15 | Expired |
| US5576674A | Optimum, multiple signal path, multiple-mode filters and method for making same | Electricity | 9 | Expired |
| US8305164B1 | Frequency-agile frequency-selective variable attenuator | Electricity | 7 | Active |
| US11329626B2 | Bandpass filter with improved upper band edge sharpness | Electricity | 2 | Active |
| US5798676A | Dual-mode dielectric resonator bandstop filter | Electricity | 2 | Expired |
| US11323094B2 | Resonator circuit using an inverter to adjust anti-resonance frequency | Electricity | 1 | Active |
| US12255625B2 | Filter using transversely-excited film bulk acoustic resonators with inductively coupled sub-resonators | Electricity | 0 | Active |
| US12206389B2 | Bandpass filter with improved upper band edge sharpness | Electricity | 0 | Active |
| US12021496B2 | Resonators with different membrane thicknesses on the same die | Electricity | 0 | Active |
| US12119805B2 | Substrate processing and membrane release of transversely-excited film bulk acoustic resonator using a sacrificial tub | Electricity | 0 | Active |
| US12308824B2 | Resonator circuit using an inverter to adjust anti-resonance frequency | Electricity | 0 | Active |
| US12028049B2 | Transversely-excited film bulk acoustic resonator filters with sub-resonators having different mark and pitch | Electricity | 0 | Active |
| US12375062B2 | Transversely-excited film bulk acoustic resonator filters with sub-resonators having different mark and pitch | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.