Trademark Attorney / Law Firm
Der-Yung Liou – Trademark Portfolio
Der-Yung Liou has 417 trademark filings recorded with the United States Patent and Trademark Office (USPTO). Of these, 26 trademarks are successfully registered — a 96% registration rate, with an additional 390 applications currently pending. The strongest areas of practice include Class 5 (Pharmaceuticals) and Class 3 (Cosmetics & Cleaning). Filing activity has been recorded from 2016 through 2026, spanning 9 years.
Showing of trademarks Trademarks
Practice Areas by Trademark Class
Der-Yung Liou's trademark practice covers 20 Nice Classification classes, representing the range of industries and goods/services handled in their USPTO filings.
Pharmaceutical and veterinary preparations; sanitary preparations for medical purposes
Bleaching preparations and other substances for laundry use; cleaning, polishing, scouring
Scientific, nautical, surveying, photographic, cinematographic, optical apparatus and instruments
Games and playthings; gymnastic and sporting articles; decorations for Christmas trees
Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying
Machines and machine tools; motors and engines; machine coupling and transmission components
Frequently Asked Questions
How many trademark applications has Der-Yung Liou filed?
Der-Yung Liou has filed 417 trademark applications with the United States Patent and Trademark Office (USPTO). Of these, 26 registered, 390 pending, 1 abandoned.
What trademark classes does Der-Yung Liou specialize in?
Der-Yung Liou has filed trademarks across 20 Nice Classification classes. The most common practice areas include Class 5 (Pharmaceuticals), Class 3 (Cosmetics & Cleaning), Class 9 (Computers & Electronics), Class 28 (Toys & Sporting Goods), Class 21 (Housewares). Class 5 covers pharmaceutical and veterinary preparations; sanitary preparations for medical purposes.
How long has Der-Yung Liou been filing trademarks?
Der-Yung Liou's trademark filing history with the USPTO spans from 2016 to 2026, covering 10 years of trademark practice. During this period, Der-Yung Liou has handled 417 trademark applications.
What is Der-Yung Liou's trademark registration success rate?
Der-Yung Liou has a 96% trademark registration rate, with 26 out of 27 resolved applications resulting in successful registration. Currently, 390 applications are pending review.