John Robert Keller
15Patents
6h-index
12Co-inventors
63Inventor score
Filing activity: Oct 28, 1977 → Nov 19, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5198823A | Passive secondary surveillance radar using signals of remote SSR and multiple antennas switched in synchronism with rotation of SSR beam | Physics | 229 | Expired |
| US4139078A | Ladder assembly | Performing Operations; Transporting | 36 | Expired |
| US8111157B2 | Apparatus for detecting tampering with a latch mechanism | Emerging Cross-Sectional Technologies | 22 | Active |
| US7382286B2 | System and method for the correlation of multiple data feeds | Physics | 14 | Expired |
| US8138917B2 | Latch monitoring apparatus for a shipping container door | Emerging Cross-Sectional Technologies | 10 | Active |
| US8154404B2 | Method and apparatus for detecting movement of a shipping container latch | Emerging Cross-Sectional Technologies | 8 | Active |
| US6778133B1 | Error correction of messages by a passive radar system | Physics | 5 | Expired |
| US12152926B2 | System and method for diagnostic analysis of a toilet over time intervals | Physics | 0 | Active |
| US12125361B2 | System and method for measuring the fill level of a trash can using a sensor | Performing Operations; Transporting | 0 | Active |
| US12171378B2 | Systems and methods for monitoring toilet paper rolls | Human Necessities | 0 | Active |
| US12044466B2 | Systems and methods for monitoring refrigeration systems | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US11954653B2 | Sensor-based automatic detection and prioritization of maintenance issues | Physics | 0 | Active |
| US12258258B2 | Beverage dispenser fluid level sensor | Performing Operations; Transporting | 0 | Active |
| US12359980B2 | Systems and methods for monitoring food temperatures | Physics | 0 | Active |
| US12287306B2 | System and method for determining an ambient concentration of compositions for bathroom cleaning | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.