John D. Marshall
20Patents
9h-index
39Co-inventors
75Inventor score
Filing activity: Jun 13, 1988 → May 22, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6122538A | Motion--Monitoring method and system for medical devices | Human Necessities | 543 | Expired |
| US6270460A | Apparatus and method to limit the life span of a diagnostic medical ultrasound probe | Human Necessities | 190 | Expired |
| US7481577B2 | Ultrasound transducer fault measurement method and system | Physics | 47 | Active |
| US4876002A | Reverse osmosis water purificaiton unit | Performing Operations; Transporting | 25 | Expired |
| US5995348A | Ground safety device for medical ultrasound probes | Electricity | 22 | Expired |
| US5542425A | Apparatus and method for preventing contact damage in electrical equipment | Emerging Cross-Sectional Technologies | 17 | Expired |
| US6196649A | Convertible surgical equipment and appliance support system | Human Necessities | 16 | Expired |
| US5776065A | Apparatus and method for controlling an ultrasound transducer array | Physics | 13 | Expired |
| US8197413B2 | Transducers, devices and systems containing the transducers, and methods of manufacture | Emerging Cross-Sectional Technologies | 11 | Active |
| US7156551B2 | Ultrasound transducer fault measurement method and system | Physics | 6 | Expired |
| US7837626B2 | Contrast agent manipulation with medical ultrasound imaging | Physics | 3 | Active |
| US7266987B2 | Ultrasound transmit and receive path calibration methods and systems | Physics | 2 | Expired |
| US8206308B2 | Shielding for intravascular ultrasound imaging systems and methods of making and using | Human Necessities | 1 | Active |
| US8946972B2 | Layer switching for an ultrasound transducer array | Physics | 1 | Active |
| US9271696B2 | Ultrasound imaging systems with bias circuitry and methods of making and using | Human Necessities | 0 | Active |
| US12343200B2 | Intravascular ultrasound systems, catheters, and methods with a manual pullback arrangement | Human Necessities | 0 | Active |
| US12403333B2 | Methods and systems for confirming focus of ultrasound beams | Human Necessities | 0 | Active |
| US7162912B2 | Ultrasound transmit and receive path calibration methods and systems | Physics | 0 | Expired |
| US12017093B2 | Methods and systems for confirming focus of ultrasound beams | Human Necessities | 0 | Active |
| US7125482B2 | Use of electrochemistry to detect buried service lead (Pb) and copper (Cu) water pipes | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.