Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Organic light emitting diode device with organic hole transporting material and phosphorescent material

Organic light emitting diode device with organic hole transporting material and phosphorescent material

US Patent 6822257 · Granted Nov 23, 2004

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Semiconductor device2025
Semiconductor device and fabrication method thereof2025
Adjustable Venturi tube2021
Organic light-emitting diode with enhanced light-emitting efficiency and color p2020
Magnetic tunnel junctions2020
Organic light-emitting diode2020
Electronic devices and related electronic systems2020
Organic light-emitting diode and white organic light-emitting diode2020
Color filter and display panel2019
Magnetic tunnel junctions2019
Organic fluorescent material and light-source module2019
Carbazole derivatives and organic light-emitting diodes by using the same2019