David A. Christopher
29Patents
13h-index
28Co-inventors
81Inventor score
Filing activity: Apr 18, 1984 → Jun 14, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6519141B2 | Handheld computer cover with deformable exterior | Emerging Cross-Sectional Technologies | 212 | Expired |
| US8843853B1 | Home screen user interface for electronic device display | Electricity | 59 | Active |
| USD443612S | Personal digital assistant device | General | 57 | Expired |
| USD446526S | Removable faceplate for a personal digital assistant device | General | 51 | Expired |
| USD452968S1 | Flip cover lid for a PDA device | General | 34 | Expired |
| US5967616A | Electrical control system for apparatus and method for continuous underground mining | Fixed Constructions | 32 | Expired |
| US5667279A | Apparatus and method for continuous mining | Fixed Constructions | 31 | Expired |
| US6364697B1 | Palmtop computer docking system | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4597067A | Borehole monitoring device and method | Fixed Constructions | 26 | Expired |
| US8800015B2 | Apparatus and methods for selecting services of mobile network operators | Electricity | 24 | Active |
| US5810447A | Apparatus and method for continuous mining | Fixed Constructions | 21 | Expired |
| USD484135S1 | Faceplate of a handheld computer | General | 14 | Expired |
| US5709433A | Apparatus for continuous mining | Fixed Constructions | 13 | Expired |
| US6900980B2 | Synchronization cradle with expansion card slots | Physics | 13 | Expired |
| US9066123B2 | System for monetizing resources accessible to a mobile device server | Electricity | 13 | Active |
| US6381126B1 | Cover with viewing window for palmtop computer | Emerging Cross-Sectional Technologies | 10 | Expired |
| US9544627B2 | System for monetizing resources accessible to a mobile device server | Electricity | 9 | Active |
| US9942588B2 | System for monetizing resources accessible to a mobile device server | Electricity | 8 | Active |
| USD485837S1 | Cover for a handheld computer | General | 8 | Expired |
| US9119051B2 | Apparatus and methods for selecting services of mobile network operators | Electricity | 4 | Active |
| US10775962B2 | Home screen user interface for electronic device display | Electricity | 3 | Active |
| US10292042B2 | Apparatus and methods for selecting services of mobile network operators | Electricity | 3 | Active |
| US9473929B2 | Apparatus and methods for distributing credentials of mobile network operators | Electricity | 2 | Active |
| US9753608B2 | Home screen user interface for electronic device display | Electricity | 1 | Active |
| US9554266B2 | Apparatus and methods for selecting services of mobile network operators | Electricity | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.