John Houldsworth
21Patents
9h-index
10Co-inventors
72Inventor score
Filing activity: May 6, 1977 → Oct 19, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5793754A | Two-way, two-wire analog/digital communication system | Electricity | 46 | Expired |
| US5093985A | Method of assembly for small electrical devices | Emerging Cross-Sectional Technologies | 37 | Expired |
| US7615966B2 | Method and apparatus for managing energy in plural energy storage units | Electricity | 34 | Expired |
| US4237457A | Display apparatus | Physics | 29 | Expired |
| US7259572B2 | Method and apparatus for detecting impedance | Physics | 17 | Expired |
| US6234658A | Method and apparatus for producing signal processing circuits in the delta sigma domain | Physics | 15 | Expired |
| US5484206A | Method and apparatus for sensing a cold junction temperature | Physics | 14 | Expired |
| US7248053B2 | One time operating state detecting method and apparatus | Electricity | 13 | Expired |
| US8115453B2 | Method and apparatus for managing energy in plural energy storage units | Electricity | 10 | Active |
| US6360283B1 | Method and apparatus for producing signal processing circuits in the delta sigma domain | Physics | 8 | Expired |
| US4160950A | Current measuring apparatus | Physics | 7 | Expired |
| US4528754A | Self-propelled drawing device or tracing device | Performing Operations; Transporting | 7 | Expired |
| US7315489B2 | Method and apparatus for time measurement | Physics | 6 | Active |
| US8306771B2 | Cell based temperature monitoring | Emerging Cross-Sectional Technologies | 3 | Active |
| US8436620B2 | Voltage monitoring using bitstream signal processing | Physics | 2 | Active |
| US8717063B2 | High voltage latching and DC restoration isolation and level shifting method and apparatus | Electricity | 2 | Active |
| US8831904B2 | Cell based temperature monitoring | Physics | 2 | Active |
| US7589533B2 | One time operating state detecting method and apparatus | Electricity | 1 | Active |
| US7477158B2 | Method and apparatus for brightness control of indication lights | Emerging Cross-Sectional Technologies | 1 | Expired |
| US8228092B2 | High voltage latching and DC restoration isolation and level shifting method and apparatus | Electricity | 1 | Active |
| US4388631A | Chart recorder | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.