Frank Keller
20Patents
9h-index
23Co-inventors
75Inventor score
Filing activity: Jul 22, 1975 → Aug 14, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7513239B2 | Compression ignition internal combustion engine | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4538028A | Apparatus for use with key telephone system with wireless telephone device | Electricity | 17 | Expired |
| US4995433A | Fuel dispenser seal | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4926921A | Louver | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4538029A | Apparatus for use with key telephone system with wireless telephone device | Electricity | 14 | Expired |
| US4209820A | Modular electrical control station | Electricity | 12 | Expired |
| USD368815S | Display stand | General | 11 | Expired |
| US4107488A | Platform mounted switch operating mechanism | Electricity | 10 | Expired |
| US3987382A | Unitized motor starter | Electricity | 9 | Expired |
| US4129843A | Magnetic trip means for circuit breaker | Electricity | 9 | Expired |
| USD373035S | Display stand | General | 8 | Expired |
| USD346952S | Combined animal attaching bracket and feed bucket holder | General | 6 | Expired |
| USD361003S | Mirrored retail display platform | General | 4 | Expired |
| US7225791B2 | Compression-ignition internal combustion engine | Emerging Cross-Sectional Technologies | 4 | Expired |
| USD364931S | Facade of a portal | General | 2 | Expired |
| US8762071B2 | Automated system for the selection and conveyance of stored allogeneic biological cells for transplantation, therapy and research | Physics | 1 | Active |
| US4092508A | Modular electrical control station with switch detent means | Emerging Cross-Sectional Technologies | 1 | Expired |
| USD359864S | Three-sided monitor display case | General | 1 | Expired |
| USD359865S | Display case | General | 1 | Expired |
| USD357591S | Swing | General | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.