SecondLook
Built with Claude: Life Sciences, selectedSkin-cancer detection with a second check. A model flags findings, and Claude audits the attention map behind each one. The doctor decides.
We build software and AIconnected to real-worldbusinesses, since 1982
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Affiliates & partners
Energy affiliate
- Coffee Della
- BlackShield
- BTS Coffee
- HeadlineReport
Proof, not promises
AgentLoop
OpenAI Build Week 2026, top 5%Local agent loops: a planner, fresh workers and a critic. A file-based rubric scores every cycle. A dashboard shows the work.
Code merged into Fairlearn
Fairlearn is an open-source toolkit for assessing and improving the fairness of machine learning models. It was started at Microsoft Research in 2018.
Recognition: Built with Claude: Life Sciences, selected · OpenAI Build Week 2026, top 5% · HackerRank Orchestrate 2026, top 5% · AAD Innovation Academy 2026, research selected
Proof, not promises
Group TK in numbers
- 1982FoundedStarted in Austin, Texas
- 17ProjectsProducts we built and businesses we run
- 12Affiliates and partnersMartial arts, protection, energy, media, consumer
- 4Patent certificatesSquat bike in 3 countries, NFT entertainment platform. Held by Grandmaster Wonik Yi
- 6Merged open-source contributionsFairlearn, skorch, opik, qdrant-client
- 4OfficesSeoul, Austin, Dallas, Dubai
Figures as of October 2026.
Patent certificates, trademark, design and copyright registrations, and business registrations. Personal details and some numbers are covered.
Patent · Squat bicycle · Korea · Registered Nov 15, 2017
Patent · Bicycle for squat exercise · Japan · Registered Apr 22, 2021
Patent · Squat-style bicycle · China · Granted and announced Dec 1, 2020
Patent · NFT-issuing entertainment platform management system on blockchain · Korea · Registered May 21, 2025
Trademark · Micro Tuber · Class 31 · Registered Apr 8, 2021
Trademark · TUBER · Class 31 · Registered Apr 13, 2020
Trademark · BAT MASK · Class 25 · Registered Mar 22, 2023
Trademark · Natopy · Class 3 · Registered Nov 22, 2023
Design registration · BAT MASK · Registered Oct 29, 2020
Seed business registration · MicroTuber Co., Ltd. (agricultural company) · Namyangju, Gyeonggi
Certificate of Trade Business Code · Group TK Co., Ltd. · Mar 20, 2020 · Korea International Trade Association
Copyright registration · Day 424 (Hollow Nation) · Screenplay · Registered Jul 30, 2026
WGAW registration · Wang Chang · Script · Effective Jul 16, 2024
Appointment · Tukong Moosul president · Apr 27, 1986
Products we built
and businesses we run.
