Inventor

COHEN LEONARD G

US21 patents

⚠️ This page may combine multiple inventors who share the name “COHEN LEONARD G”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

COHEN LEONARD G

AT & T BELL LAB

Passive optical communication network with broadband upgrade

Optical communication network with passive monitoring

Article comprising a passive optical waveguide

Optical communication system comprising a fiber amplifier

Optical communication system with multiple fiber monitoring

Optical filter having multiple interferometric stages

Mode scrambler with non-invasive fabrication in an optical fiber&#39;s cladding

Telecommunication system with fiberguide signal filtering

AMERICAN TELEPHONE & TELEGRAPH

Optical fiber sensors for chemical detection

Waveguide-containing communications and sensing systems

Optical fiber with depressed index outer cladding

BeF2 -based optical fibers

LUCENT TECHNOLOGIES INC

Comb splitting system and method for a multichannel optical fiber communication network

Upgradable fiber-coax network

Method for upgrading a hybrid fiber coax network to an all fiber network

AT & T CORP

Optical network comprising a compact wavelength-dividing component

Thermally activated optical switch

Remote sensing in optical fiber networks by synchronously detecting backscattered optical signals

BELL TELEPHONE LABOR INC

Double-clad optical fiberguide

Multimode optical fiber with radially varying attenuation center density

Low loss single mode fiber

Mode scrambler with non-invasive fabrication in an optical fiber's cladding