Mission

IP trials and litigations

- Warning letter and Written answer

- Third party observation

- Scope confirmation trials

- Invalidation trials (including patent term extension)

- Litigation in Patent court and Supreme court

Our successes


Acute Airway Inflammation Treatment “Pelubi(Pelubiprofen)” Case (2019Dang4144 etc.)

Won Scope Conformation case in tribunal

Represented Youngjin, Huons and ChongKunDang



Morning sickness Treatment “Diclectin (pyridoxine /Doxylamine)” Case (2019Jung80)

Won for Opposition of Correction in tribunal

Represented Huons



Overactive bladder Treatment “Betmiga (Mirabegron)” Case (2017Dang558 etc.)

Won Scope Conformation case in tribunal

Represented ChongKunDang and KyoungDong



Diabetes Treatment “Trajenta (Linagliptin)” Case (2015Dang1352 etc.)

Won Invalidation case in tribunal

Represented 4 Korean Pharmaceutical companies including KyungDong



Dysuria Treatment “Thrupass (Silodosin)” Case (2014dang3375)

Won Scope Conformation case in tribunal (Crystal form)

Represented ChongKunDang



Dysuria Treatment “Thrupass (Silodosin)” Case (2014Dang3374)

Won Scope Conformation case in tribunal (Formulation)

Represented ChongKunDang



Pain Treatment “Celebrex (Celecoxib)” Case (2014Dang2204)

Won Invalidation case in tribunal

Represented Yuhan and Boryung



Hyperlipidemia Treatment “Crestor(Rosuvastatin)” Case (2013Dang2787)

Won Invalidation case in tribunal

Represented Yuhan



Diabetes Treatment “Januvia(Sitagliptin)” Case (2015Dang833 etc.)

Won Scope Conformation case in tribunal (Hydrate)

Represented 8 Korean Pharmaceutical companies including Dasan



Diabetes Treatment “Januvia(Sitagliptin)” Case (2014Dang3400 etc., 2016Huh991, 2018Hu10589)

Won Invalidation case in supreme court (Hydrate)

Represented ChongKunDang and YoungJin



Diabetes Treatment “Januvia(Sitagliptin)” Case (2014Dang3395 etc., 2016Huh984, 2018Hu10572)

Won Invalidation case in supreme court (Salt)

Represented 8 Korean Pharmaceutical companies including ChongKunDang



GIST Treatment “Gleevec (Imatinib)” Case (2013Dang688, 2014Huh4913, 2016Hu502)

Won Invalidation case in supreme court (Use)

Represented Boryung and Jeil



CML Treatment “Gleevec (Imatinib)” Case (2011Dang2999, 2013Huh4749, 2013Hu3371)

Won Invalidation case in supreme court (Formulation)

Represented Boryung


Kyoyeonip│No.702, 13, Teheran-ro 70-gil, Gangnam-gu, Seoul, 06194 Republic of Korea │Tel : +82-2-418-5282│ link@kyoyeonip.com 

Copyright ⓒ 2021.Kyoyeonip.All rights reserved.