David J. Logan
65Patents
20h-index
46Co-inventors
88Inventor score
Filing activity: Jul 9, 1973 → Aug 27, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4467525A | Automated sign generator | Emerging Cross-Sectional Technologies | 66 | Expired |
| US4680596A | Method and apparatus for controlling ink-jet color printing heads | Electricity | 63 | Expired |
| US4989316A | Method and apparatus for making prescription eyeglass lenses | Emerging Cross-Sectional Technologies | 61 | Expired |
| US4583181A | Fabric flaw related system | Emerging Cross-Sectional Technologies | 60 | Expired |
| US5053971A | Method and apparatus for edging an optical lens | Emerging Cross-Sectional Technologies | 42 | Expired |
| US5537135A | Method and apparatus for making a graphic product | Performing Operations; Transporting | 36 | Expired |
| US4799172A | Apparatus and method for automatic layout of sign text | Physics | 32 | Expired |
| US5026584A | Sign making web with dry adhesive layer | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5551786A | Apparatus for making a graphic product | Performing Operations; Transporting | 29 | Expired |
| US4761315A | Blank for use in a lens pattern generator | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4724617A | Apparatus for tracing the lens opening in an eyeglass frame | Physics | 28 | Expired |
| US4591999A | Method and apparatus for automatically spacing characters during composition | Physics | 27 | Expired |
| US4575730A | Ink jet printing randomizing droplet placement apparatus | Performing Operations; Transporting | 24 | Expired |
| US5720649A | Optical lens or lap blank surfacing machine, related method and cutting tool for use therewith | Performing Operations; Transporting | 23 | Expired |
| US4547786A | Ink jet printing system | Electricity | 23 | Expired |
| US4435904A | Automated measuring scale | Performing Operations; Transporting | 22 | Expired |
| US5288358A | Sign making web with dry adhesive layer and method of using the same | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4834276A | Web loading and feeding system, related web construction and method and apparatus for making web | Performing Operations; Transporting | 22 | Expired |
| US5466501A | Sign making web with tack killing overcoat removable by washing and related method | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5555009A | Printing apparatus with pressure regulation | Performing Operations; Transporting | 20 | Expired |
| US5139373A | Optical lens pattern making system and method | Emerging Cross-Sectional Technologies | 19 | Expired |
| US7668651B2 | Reverse geocoding system using combined street segment and point datasets | Physics | 18 | Active |
| US4867363A | Web loading and feeding system | Performing Operations; Transporting | 17 | Expired |
| US3936712A | Interactive graphic system | Performing Operations; Transporting | 17 | Expired |
| US6106665A | Apparatus for making ophthalmic lenses by vacuum lamination | Performing Operations; Transporting | 15 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.