David L. Freeman
20Patents
14h-index
12Co-inventors
78Inventor score
Filing activity: Oct 23, 1990 → Dec 28, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6832171B2 | Circuit and method for determining battery impedance increase with aging | Physics | 156 | Expired |
| US6892148B2 | Circuit and method for measurement of battery capacity fade | Emerging Cross-Sectional Technologies | 109 | Expired |
| US6789026B2 | Circuit and method for monitoring battery state of charge | Physics | 89 | Expired |
| US5432429A | System for charging/monitoring batteries for a microprocessor based system | Emerging Cross-Sectional Technologies | 69 | Expired |
| US6377028B1 | System for charging monitoring batteries for a microprocessor based method | Electricity | 62 | Expired |
| US6577135B1 | Battery pack with monitoring function utilizing association with a battery charging system | Emerging Cross-Sectional Technologies | 61 | Expired |
| US5284719A | Method and apparatus for monitoring battery capacity | Emerging Cross-Sectional Technologies | 61 | Expired |
| US5440221A | Method and apparatus for monitoring batttery capacity with charge control | Emerging Cross-Sectional Technologies | 53 | Expired |
| US5965997A | Battery monitoring circuit with storage of charge and discharge accumulation values accessible therefrom | Emerging Cross-Sectional Technologies | 39 | Expired |
| US6650089B1 | Control circuit for multiple battery systems with capacity gauge on end equipment | Electricity | 38 | Expired |
| US5357203A | Battery monitoring circuit for operating with high battery discharge rates | Emerging Cross-Sectional Technologies | 38 | Expired |
| US6369576B1 | Battery pack with monitoring function for use in a battery charging system | Emerging Cross-Sectional Technologies | 27 | Expired |
| US6107802A | Battery pack with monitoring function utilizing association with a battery charging system | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5454710A | Display system for a battery monitoring circuit | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5548204A | Linear/switching regulator circuit | Physics | 10 | Expired |
| US8575845B2 | Method and apparatus to measure light intensity | Electricity | 1 | Active |
| US5744942A | Linear slewing regulator | Physics | 1 | Expired |
| US9222802B2 | Sensor power management | Physics | 1 | Active |
| US8570012B2 | Diode for use in a switched mode power supply | Electricity | 1 | Active |
| US10823581B2 | Sensor power management | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.