Robert A. Ehrhardt
18Patents
5h-index
19Co-inventors
63Inventor score
Filing activity: Mar 31, 1997 → Oct 10, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5978004A | Label printer with label edge sensor | Performing Operations; Transporting | 38 | Expired |
| US8721203B2 | Memory system and method for consumables of a printer | Performing Operations; Transporting | 36 | Active |
| US7071961B2 | Ribbon drive and tensioning system for a print and apply engine for a printer | Performing Operations; Transporting | 20 | Expired |
| US7079168B2 | Ribbon drive and tensioning system for a print and apply engine or a printer | Performing Operations; Transporting | 17 | Expired |
| US7038703B2 | Label printer with label edge detector | Performing Operations; Transporting | 5 | Expired |
| US7391043B2 | Self calibrating media edge sensor | Performing Operations; Transporting | 3 | Expired |
| US10138085B2 | Clear card sensors | Physics | 3 | Active |
| US9168774B2 | Tri-state detector for detecting types of light | Physics | 3 | Active |
| US9561646B2 | High speed adaptive thermal printhead interface | Performing Operations; Transporting | 1 | Active |
| US9513856B2 | Beam shaping near field communication device | Emerging Cross-Sectional Technologies | 1 | Active |
| US9962976B2 | Methods and apparatus to detect an ink ribbon based on types of light | Physics | 1 | Active |
| US8587825B2 | Ethernet and USB powered printers and methods for supplying ethernet and USB power to a printer | Physics | 1 | Active |
| US10114983B2 | Spindle supported near field communication device | Electricity | 0 | Active |
| US10793383B2 | Clear card sensors | Physics | 0 | Active |
| US9632734B2 | Spindle supported near field communication device | Electricity | 0 | Active |
| US9747062B2 | Ethernet and USB powered printers and methods for supplying Ethernet and USB power to a printer | Physics | 0 | Active |
| US10241733B2 | Methods and apparatus for supplying power to a printer | Physics | 0 | Active |
| US9189184B2 | Ethernet and USB powered printers and methods for supplying Ethernet and USB power to a printer | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.