Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
RL

Ralph A. Logan

ATAT&T: 7 patents #2,615 of 18,772Top 15%
BLBell Telephone Laboratories: 5 patents #75 of 1,445Top 6%
Morristown, NJ: #143 of 1,322 inventorsTop 15%
New Jersey: #6,688 of 69,400 inventorsTop 10%
Overall (All Time): #391,273 of 4,157,543Top 10%
13 Patents All Time

Issued Patents All Time

Showing 1–13 of 13 patents

Patent #TitleCo-InventorsDate
5040186 InP-based quantum-well laser Tawee Tanbun-Ek, Henryk Temkin 1991-08-13
4953170 Method for forming a heteroepitaxial structure, and a device manufactured thereby Tawee Tanbun-Ek, Henryk Temkin 1990-08-28
4701995 Method of making a nonplanar buried-heterostructure distributed-feedback laser Gerald Dolan, Henryk Temkin, Daniel Paul Wilt 1987-10-27
4627065 Double active layer semiconductor laser Won-Tien Tsang 1986-12-02
4575919 Method of making heteroepitaxial ridge overgrown laser Won-Tien Tsang 1986-03-18
4536940 Method of making a loss stabilized buried heterostructure laser Charles H. Henry 1985-08-27
4481631 Loss stabilized buried heterostructure laser Charles H. Henry 1984-11-06
4464211 Method for selective area growth by liquid phase epitaxy Won-Tien Tsang 1984-08-07
4390889 Photodiode having an InGaAs layer with an adjacent InGaAsP p-n junction Federico Capasso, Albert Lee Hutchinson 1983-06-28
4269635 Strip buried heterostructure laser Won-Tien Tsang 1981-05-26
4226667 Oxide masking of gallium arsenide 1980-10-07
4194933 Method for fabricating junction lasers having lateral current confinement Won-Tien Tsang 1980-03-25
4190813 Strip buried heterostructure laser Won-Tien Tsang 1980-02-26