Richard Landry Gray (2 out of 42 patents)
Yu Hai Mao (1 out of 1 patent)
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USPTO Data Jan 1 1976 - Oct 27 2026
2 Patents
#877 in Song Fang Yuan, Shangdixili, Haidian Dist., Beijing
#11,649 in China
Beijing Effiled Opto-Electronics Technology Co., Ltd
Forward Citations = 4
2 inventors:
Song Fang Yuan, Shangdixili, Haidian Dist., Beijing, China
Beijing Effiled Opto-Electronics Technology Co., Ltd
Calculating rank
% Expired Patents = 50.0
Forward Citations = 4
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2 inventors (with patents filed for the assignee):
2 patents:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Beijing Effiled Opto-Electronics Technology Co., Ltd. Retrieved from https://idiyas.com/company/beijing-effiled-opto-electronics-technology-company
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]