Patent assignee · US · COMPANY

Zhone Technologies, Inc.

5Patents
0Active
5Granted
30Portfolio score

Filing activity: Feb 17, 1999 → Jun 20, 2001

Most-cited patents

PatentTitleAreaCited byStatus
US6667973B1 Flexible SONET access and transmission systems Emerging Cross-Sectional Technologies 85 Expired
US6768745B1 Flexible SONET access and transmission system Emerging Cross-Sectional Technologies 83 Expired
US7197010B1 System for real time voice quality measurement in voice over packet network Electricity 31 Expired
US6744887B1 Acoustic echo processing system Electricity 24 Expired
US6690644B1 Mechanism for 1:1, 1+1, and UPSR path-switched protection switching Electricity 17 Expired

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.