David M. Johnson
49Patents
19h-index
45Co-inventors
81Inventor score
Filing activity: Aug 2, 1976 → Feb 16, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6196910A | Polycrystalline diamond compact cutter with improved cutting by preventing chip build up | Performing Operations; Transporting | 150 | Expired |
| US6045440A | Polycrystalline diamond compact PDC cutter with improved cutting capability | Emerging Cross-Sectional Technologies | 114 | Expired |
| US5486137A | Abrasive tool insert | Emerging Cross-Sectional Technologies | 104 | Expired |
| US5494477A | Abrasive tool insert | Emerging Cross-Sectional Technologies | 104 | Expired |
| US5847981A | Multiply and accumulate circuit | Physics | 80 | Expired |
| US7689459B2 | Card with embedded bistable display having short and long term information | Physics | 77 | Active |
| US5848657A | Polycrystalline diamond cutting element | Fixed Constructions | 67 | Expired |
| US5484330A | Abrasive tool insert | Emerging Cross-Sectional Technologies | 50 | Expired |
| US5743346A | Abrasive cutting element and drill bit | Emerging Cross-Sectional Technologies | 49 | Expired |
| US5560754A | Reduction of stresses in the polycrystalline abrasive layer of a composite compact with in situ bonded carbide/carbide support | Chemistry; Metallurgy | 48 | Expired |
| US5660075A | Wire drawing die having improved physical properties | Performing Operations; Transporting | 46 | Expired |
| US8102362B2 | Indexing writehead for bistable media | Performing Operations; Transporting | 44 | Active |
| USD673318S1 | Roadway light fixture | General | 25 | Active |
| USD665940S1 | Roadway light fixture | General | 23 | Active |
| US6198779A | Method and apparatus for adaptively classifying a multi-level signal | Electricity | 21 | Expired |
| USD695437S1 | Roadway lamp fixture | General | 21 | Active |
| US5829541A | Polycrystalline diamond cutting element with diamond ridge pattern | Fixed Constructions | 21 | Expired |
| US6885409B2 | Cholesteric liquid crystal display system | Physics | 21 | Expired |
| USD666759S1 | Roadway light fixture | General | 20 | Active |
| US6505326B1 | Analyzing thermal characteristics of geometries | Physics | 19 | Expired |
| US7507449B2 | Displays with low driving voltage and anisotropic particles | Physics | 18 | Active |
| US6526550B1 | Analyzing characteristics of geometries | Physics | 16 | Expired |
| US6042463A | Polycrystalline diamond compact cutter with reduced failure during brazing | Fixed Constructions | 16 | Expired |
| US6710760B1 | Unipolar drive for cholesteric liquid crystal displays | Physics | 12 | Expired |
| US6314836A | Wire drawing die with non-cylindrical interface configuration for reducing stresses | Performing Operations; Transporting | 12 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.