If you're interested in Fusion and delve into the world of blockchain patents, you might notice that Dejun Qian has his name attached to quite a number of patents.
For Worldwide and Chinese patents take a look at https://patentscope.wipo.int/ and for US patents look at https://patents.justia.com/
Update: All relavenet US patents are found through this link https://patents.justia.com/assignee/shanghai-fenfu-information-technology-co-ltd
Two patents seem to be the most established ones.
METHOD FOR PERFORMING SEGMENTING LOCKING AND MERGING CONTROL OF ENCRYPTED DIGITAL ASSETS BASED ON TIME DIMENSION which relates is used for time-slices/time frames and FRC758s. The publication in the US is very recent.
The other one is Method for External Data-Based Constructing Various Triggering Mechanisms to Execute Smart Contract in Blockchain Network and System Thereof which is the Multi-trigger mechanism described in Fusion's white paper where time, on-chain events and off-chain events through oracles can be used to trigger more complex smart contract and is very important to be able to realize a full automation of Finance. The US publication is also quite recent.
On https://patentscope.wipo.int/ you can find many patents with Dejun Qian's name on them. The most important one is probably WO2019200765 - SYSTEM AND CORRESPONDING METHOD FOR REALIZING MAPPING OF DIGITAL ASSET ON MAPPING CHAIN BASED ON DISTRIBUTED TECHNIQUE which describes the kind of cross-chain mapping of assets used by AnySwap and DCRM-tech. That publication is in Chinese, but I took the time to perform the site-available machine translation into English.
The below patents also hold Dejun Qian's name as the main inventor, but don't necessarily relate directly to his efforts with Fusion. Some may, though some may also be more associated with QTUM.
CN106897068 - ACHIEVEMENT METHOD OF DECENTRALIZED APPLICATION PROGRAM DEVELOPMENT PLATFORM
CN107392610 - REALIZATION METHOD OF RELIABLE DATA SOURCE OF DISTRIBUTED NETWORK
CN106934710 - QUANTUM CONTRACT ACCOUNT BOOK BASED ON INTELLIGENT CONTRACT CONTENT
CN106940854 - BRIDGING METHOD BETWEEN UTXO MODEL AND CONTRACT
CN106897878 - SMART CONTRACT TYPE IMPLEMENTATION MODE OF QUANTUM CHAIN SYSTEM
CN106878318 - BLOCK CHAIN REAL-TIME POLLING CLOUD SIDE SYSTEM
CN106952082 - QUANTUM CHAIN CONSENSUS MECHANISM METHOD BASED ON SHARE CERTIFICATE
CN106920097 - METHOD FOR GENERATING TIMECHAIN OF QUANTUM CONSENSUS AGREEMENT
CN107070660 - STORAGE DESIGN METHOD OF BLOCK CHAIN ENCRYPTION RADIO FREQUENCY (RF) CHIP
CN107067242 - METHOD FOR CREATING DIFFICULTY VALUE IN BLOCK CHAIN GENERATION PROCESS
CN107093142 - LEGAL CURRENCY AND ASSET MANAGEMENT METHOD IN QUANTUM CHAIN
CN106951307 - INTELLIGENT CONTRACT VIRTUAL MACHINE REALIZATION METHOD
CN107103535 - METHOD FOR GENERATING QUANTUM CONTRACT ACCOUNT BOOK MECHANISM BASED ON INTELLIGENT CONTRACTS
CN107104850 - QUANTUM CHAIN TESTING METHOD