Trademark Attorney / Law Firm
Sirina Tsai – Trademark Portfolio
With a filing history spanning 24 years (1993–2026), Sirina Tsai has represented clients in 303 trademark filings before the United States Patent and Trademark Office (USPTO). Over the course of this practice, 143 trademarks have achieved registered status, while 29 remain pending. Areas of expertise include Class 35 (Advertising & Business) and Class 41 (Education & Entertainment), among 20 Nice Classification classes represented.
Showing of trademarks Trademarks
Practice Areas by Trademark Class
Sirina Tsai's trademark practice covers 20 Nice Classification classes, representing the range of industries and goods/services handled in their USPTO filings.
Advertising; business management; business administration; office functions
Education; providing of training; entertainment; sporting and cultural activities
Pharmaceutical and veterinary preparations; sanitary preparations for medical purposes
Beers; mineral and aerated waters and other non-alcoholic beverages; fruit beverages
Scientific, nautical, surveying, photographic, cinematographic, optical apparatus and instruments
Medical services; veterinary services; hygienic and beauty care for human beings or animals
Insurance; financial affairs; monetary affairs; real estate affairs
Scientific and technological services; industrial analysis and research services
Frequently Asked Questions
How many trademark applications has Sirina Tsai filed?
Sirina Tsai has filed 303 trademark applications with the United States Patent and Trademark Office (USPTO). Of these, 143 registered, 29 pending, 75 abandoned, 56 cancelled.
What trademark classes does Sirina Tsai specialize in?
Sirina Tsai has filed trademarks across 20 Nice Classification classes. The most common practice areas include Class 35 (Advertising & Business), Class 41 (Education & Entertainment), Class 5 (Pharmaceuticals), Class 25 (Clothing), Class 32 (Light Beverages). Class 35 covers advertising; business management; business administration; office functions.
How long has Sirina Tsai been filing trademarks?
Sirina Tsai's trademark filing history with the USPTO spans from 1993 to 2026, covering 33 years of trademark practice. During this period, Sirina Tsai has handled 303 trademark applications.
What is Sirina Tsai's trademark registration success rate?
Sirina Tsai has a 52% trademark registration rate, with 143 out of 274 resolved applications resulting in successful registration. Currently, 29 applications are pending review.