Charles E. Johnson
35Patents
11h-index
46Co-inventors
75Inventor score
Filing activity: Jan 28, 1975 → Sep 5, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3939823A | Esophageal transducer | Physics | 33 | Expired |
| US4052095A | Synthetic organic polymeric sling protected by vulcanized or cured elastomeric laminate at load contacting area thereof | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4458412A | Leadless chip placement machine for printed circuit boards | Emerging Cross-Sectional Technologies | 25 | Expired |
| US9785123B2 | Digital analog display with rotating bezel | Physics | 25 | Active |
| US4200325A | Synthetic organic polymeric plastic sling protected by vulcanized or cured elastomeric laminate at load contacting area thereof | Textiles; Paper | 19 | Expired |
| US5746459A | Power door latch method and apparatus | Emerging Cross-Sectional Technologies | 18 | Expired |
| US7921954B2 | Stabilized mobile unit or wheelchair | Emerging Cross-Sectional Technologies | 15 | Active |
| US8517742B1 | Labor resource testing system and method | Physics | 14 | Active |
| US5538119A | Synchronizing arrangement with torque lock feature | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US4909351A | Platform attachment for a ladder | Fixed Constructions | 12 | Expired |
| US5458388A | Replaceable nozzle tip with vacuum actuated mechanical gripping fingers | Performing Operations; Transporting | 11 | Expired |
| US4048369A | Method for controlling allergens | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4114637A | Variable differential pressure unloading valve apparatus | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4527324A | Leadless chip placement machine for printed circuit boards | Emerging Cross-Sectional Technologies | 11 | Expired |
| US7527467B2 | Retractable ramp system for a mobility vehicle | Emerging Cross-Sectional Technologies | 10 | Expired |
| US7694780B2 | Pump for transfer case | Mechanical Engineering; Lighting; Heating | 10 | Active |
| US4637511A | Longer lasting woven polyaramide belting for high temperature applications | Textiles; Paper | 9 | Expired |
| US6981167B2 | Programmable controller with sub-phase clocking scheme | Physics | 8 | Expired |
| US6067229A | Heat dissipating enclosure for electronic components | Electricity | 8 | Expired |
| US5335898A | Apparatus and method for clamping structural members during joinder | Performing Operations; Transporting | 7 | Expired |
| US6407917B1 | Fluid flow management system | Electricity | 7 | Expired |
| US7758063B2 | Stabilized mobile unit or wheelchair | Human Necessities | 6 | Active |
| US6298568A | Feeler gage alignment tool | Electricity | 5 | Expired |
| US8952232B2 | Circular piano keyboard | Physics | 4 | Active |
| US6608574B1 | Device, system, and method for compensating for isolation and cable delays in an SSI encoder interface circuit | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.