Robert D. Johnson
42Patents
19h-index
50Co-inventors
84Inventor score
Filing activity: Jun 30, 1975 → Jul 27, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6574490B2 | System for non-invasive measurement of glucose in humans | Physics | 887 | Expired |
| US6983176B2 | Optically similar reference samples and related methods for multivariate calibration models used in optical spectroscopy | Human Necessities | 366 | Expired |
| US6865408B1 | System for non-invasive measurement of glucose in humans | Physics | 220 | Expired |
| US7139598B2 | Determination of a measure of a glycation end-product or disease state using tissue fluorescence | Human Necessities | 203 | Expired |
| US4026355A | Method for testing and monitoring for producing landfill gas | Fixed Constructions | 123 | Expired |
| US4185847A | Skateboard truck with independent wheel suspension | Human Necessities | 58 | Expired |
| US6684099B2 | Apparatus and method for reducing spectral complexity in optical sampling | Human Necessities | 57 | Expired |
| US5664880A | Handheld golf course distance computer for automatically computing distances to sequentially selected points | Human Necessities | 52 | Expired |
| US6862091B2 | Illumination device and method for spectroscopic analysis | Physics | 48 | Expired |
| US8140147B2 | Determination of a measure of a glycation end-product or disease state using a flexible probe to determine tissue fluorescence of various sites | Physics | 41 | Active |
| US6130536A | Preform test fixture and method of measuring a wall thickness | Performing Operations; Transporting | 40 | Expired |
| US7403804B2 | Noninvasive determination of alcohol in tissue | Human Necessities | 37 | Expired |
| US6424207B1 | PWM active filter for DC power systems | Electricity | 28 | Expired |
| US8922062B2 | Automatic voltage regulation for photovoltaic systems | Emerging Cross-Sectional Technologies | 26 | Active |
| US8121671B2 | Determination of a measure of a glycation end-product or disease state using tissue fluorescence preferentially from the dermis | Human Necessities | 23 | Active |
| US8131332B2 | Determination of a measure of a glycation end-product or disease state using tissue fluorescence of various sites | Human Necessities | 21 | Active |
| US8078243B2 | Determination of a measure of a glycation end-product or disease state using tissue fluorescence | Human Necessities | 20 | Active |
| US5623323A | Extra wide field ophthalmic lens | Human Necessities | 20 | Expired |
| US9300224B2 | Automatic voltage regulation for photovoltaic systems | Emerging Cross-Sectional Technologies | 20 | Active |
| US4619465A | Shim for adjusting camber | Emerging Cross-Sectional Technologies | 19 | Expired |
| US9257847B2 | Photovoltaic system with managed output | Emerging Cross-Sectional Technologies | 19 | Active |
| US4176850A | Skateboard truck with independent wheel suspension | Human Necessities | 18 | Expired |
| US5634286A | Display sign | Physics | 17 | Expired |
| US7082623B2 | Impact absorbing protective gear | Human Necessities | 17 | Expired |
| US9481403B1 | Secure truck box system | Performing Operations; Transporting | 17 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.