Charles E. Campbell
42Patents
15h-index
26Co-inventors
81Inventor score
Filing activity: Jun 13, 1977 → Jul 10, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4802602A | Insulating device for a beverage container | Performing Operations; Transporting | 224 | Expired |
| US6082856A | Methods for designing and making contact lenses having aberration control and contact lenses made thereby | Physics | 130 | Expired |
| US7988290B2 | Systems and methods for measuring the shape and location of an object | Human Necessities | 48 | Active |
| US4415076A | Soft contact lens container | Emerging Cross-Sectional Technologies | 47 | Expired |
| US5521515A | Frequency scanning capaciflector for capacitively determining the material properties | Physics | 43 | Expired |
| US5208619A | Automatic refractor, lensmeter and keratometer utilizing Badal optics | Human Necessities | 35 | Expired |
| US7413306B2 | Sphero cylindrical eye refraction system using fluid focus electrostatically variable lenses | Physics | 29 | Expired |
| US5469261A | Measurement of lens characteristics | Physics | 26 | Expired |
| US7168807B2 | Iterative fourier reconstruction for laser surgery and other optical applications | Physics | 24 | Expired |
| US7377648B2 | Volumetric point spread function for eye diagnosis and treatment | Human Necessities | 23 | Expired |
| US6871953B1 | Contact lens with transition | Physics | 22 | Expired |
| US7001020B2 | Complete autorefractor system in an ultra-compact package | Human Necessities | 21 | Expired |
| US7976163B2 | System and method for measuring corneal topography | Human Necessities | 21 | Active |
| US7175278B2 | Wavefront reconstruction using fourier transformation and direct integration | Physics | 15 | Expired |
| US6910770B2 | Eye refractor with active mirror wavefront sensor | Physics | 15 | Expired |
| US5198867A | Adaption of lensmeter optics for minimizing contact lens spherical aberration | Physics | 14 | Expired |
| US4098002A | Apparatus for locating inter-pupilary of nose bridge mounted spectacles to lens meter | Physics | 13 | Expired |
| US7931374B2 | Wavefront propagation from one plane to another | Human Necessities | 13 | Active |
| US5323194A | Perimeter with non spherical bowl | Human Necessities | 12 | Expired |
| US5461436A | Color field test with occlusion of non-tested eye | Human Necessities | 12 | Expired |
| US5175594A | Lensmeter with correction for refractive index and spherical aberration | Physics | 11 | Expired |
| US8123357B2 | Wavefront propagation from one plane to another | Human Necessities | 11 | Active |
| US4561738A | Field tester | Human Necessities | 10 | Expired |
| USD397420S | Spray container | General | 10 | Expired |
| US5303022A | Lensometer with guided lens movement for progressive addition lens | Physics | 9 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.