This inventor holds 2 USPTO granted patents. Top assignees: Guizhou Power Grid Co., Ltd, Electric Power Research Institute, China Southern Powerr Grid, Power Research Institute, China Southern Power Grid. Active years: 2026.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
2 out of 4 
1 out of 1 
1 out of 1 Years Active: 2026
Title: Hangfeng Li: Innovations in Blockchain Voting and Timestamping.
Introduction
Hangfeng Li is an inventor based in Guiyang, China. His work includes blockchain-based methods for anonymous voting and timestamp generation. He is associated with 2 patents.
Latest Patents
Li’s latest patents address privacy, verification, and reliable recordkeeping through blockchain technology.
- **Blockchain-Based Anonymous Trusted Voting Method, Apparatus and Related Device.** This invention describes a trusted anonymous voting process. It hashes the original voting content to produce a commitment value, blinds that value using information from other voters, and signs the resulting commitment tuple. After other voters verify the signature, the method forms a vote tuple and uploads it, along with a commitment tuple, to the blockchain. The commitment tuple supports decrypting the vote tuple, while the process is designed to preserve voter anonymity and enable verification.
- **Timestamp Generation Method and Apparatus, and Electronic Device and Storage Medium.** This invention proposes generating timestamps without relying on a traditional trusted third-party timestamp authority to record file information. The method hashes a file record and sends the hash to a random issuer. The issuer signs the hash together with its receiving time, and the resulting signature is stored on a blockchain as the file’s timestamp.
Career Highlights
Li’s listed professional affiliations include Guizhou Power Grid Co., Ltd. and the Power Research Institute of China Southern Power Grid. His patent work applies cryptographic techniques and blockchain records to voting and timestamping challenges.
Collaborations
Yong Xiao and Jiaxiang Ou are identified as Li’s coworkers. The available information does not specify their roles in the listed inventions.
Conclusion
Hangfeng Li’s patents focus on using blockchain and cryptographic methods to support anonymous voting and timestamped records, reflecting an emphasis on privacy, verification, and dependable digital recordkeeping.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile