John Evans
26Patents
8h-index
28Co-inventors
75Inventor score
Filing activity: Oct 4, 1974 → Feb 25, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6542358B1 | Retractable platform with wireless electrical interface | Physics | 44 | Expired |
| US7200680B2 | Method, apparatus and system for providing multimedia messages to incompatible terminals | Electricity | 37 | Expired |
| US4086513A | Plural gun cathode ray tube having parallel plates adjacent grid apertures | Electricity | 35 | Expired |
| US6307880A | Method and system for externally incorporating automatic switching between voice and data communications | Electricity | 32 | Expired |
| US3952224A | In-line electron guns having consecutive grids with aligned vertical, substantially elliptical apertures | Electricity | 22 | Expired |
| US9641681B2 | Methods and systems for determining conversation quality | Electricity | 20 | Active |
| US6219732A | Apparatus and method for wireless communication between a host and a selectively removable module electrically connected to the host | Electricity | 17 | Expired |
| US5394789A | Manually operable device for metering air through a valve system for drawing into, retaining and evacuating material from a chamber | Performing Operations; Transporting | 14 | Expired |
| US6573729B1 | Systems and methods for impedance synthesis | Electricity | 5 | Expired |
| US6567472B1 | System and method for terminating a line by reflecting a scaled impedance | Electricity | 4 | Expired |
| US6283773A | Media jack with external fuse access | Electricity | 4 | Expired |
| US6377667B1 | Telephone line-assist powered apparatus with programmable hold current | Electricity | 4 | Expired |
| US8444847B1 | Low voltage electrolysis of water | Emerging Cross-Sectional Technologies | 3 | Active |
| US8517272B1 | Method to differentiate aiming from active decoding | Physics | 3 | Active |
| US6859051B1 | Systems and methods for impedance synthesis | Electricity | 2 | Expired |
| US5485779A | Device for selectively pressurizing or evacuating a chamber with an oscillating air source by metering air through a valve system and a device for drawing into, retaining and evacuating material from a chamber | Performing Operations; Transporting | 2 | Expired |
| US6654461B1 | Synthesized telephone line ring signal impedance termination | Electricity | 1 | Expired |
| US7660408B1 | Attenuation and termination circuit using impedance synthesis | Electricity | 1 | Expired |
| US8472614B2 | Attenuation and termination circuit using impedance synthesis | Electricity | 0 | Active |
| US6456665B1 | Partial modification of a nominal impedance using digital impedance synthesis | Electricity | 0 | Expired |
| US11210924B1 | Systems and methods for alerting users to device low battery states | Electricity | 0 | Active |
| US6338077B1 | Transfer function implementation using digital impedance synthesis | Electricity | 0 | Expired |
| US6697485B1 | Data signal attenuator and systems and methods for using same | Electricity | 0 | Expired |
| US8876005B2 | Arrangement for and method of managing a soft keyboard on a mobile terminal connected with a handheld electro-optical reader via a bluetooth® paired connection | Physics | 0 | Active |
| US6700387B1 | Systems and methods for impedance synthesis | Electricity | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.