Joop Elzas MSc

Partner, Benelux and European trademark and design attorney

Joop Elzas


Joop was awarded his degree in Chemistry, with a minor in Information Science, in 1983. Following graduation he worked at an IP firm where he did both patent and trademark work. Because the trademark practice developed considerably under his guidance, the decision to go fulltime with trademark protection was soon made. After first managing the trademark department of two IP firms, Joop then ran his own trademark agency for many years (Elzas Noordzij). Joop has been associated with Arnold & Siedsma since 2012 and is responsible for the trademark department at the Amsterdam office.

Joop believes that the level of service is just as important as the content of the cases themselves. The legal aspects of a case must of course be dealt with to perfection, but the client must also be aware that immediate attention is always given to every case, that the client is informed as fully as possible on all matters and is made aware of all possible options. Joop sees it as his responsibility to support and advise his clients. Joop considers communication with clients to be very important, so he can be reached at all times. Joop intends to be a trusted adviser for each client. 

What others say about Joop:
Service-oriented, analytical, communicative skills, really dislikes losing a case

WTR 1000 about Joop:
At the heart of the operation is Joop Elzas. “When it comes to handling matters efficiently, at a reasonable cost and with excellent results, Elzas ticks all three boxes. A sharp, strategic thinker who really stands out in the more complex trademark cases, he is indeed one of the very best around.”
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Work history:

1983 - 2012: Trademark attorney and head of trademark department at various IP firms
2012 - present: Trademark attorney at Arnold & Siedsma in Amsterdam

1983: VU University Amsterdam, Chemistry
1985: Benelux trademark and design attorney BMM
Qualified European trademark and design attorney

Dutch, English, German, Hebrew

Outside activities & memberships:
Joop is a member of BMM and INTA and has been active for many years in various INTA committees. He is also involved in various other administrative activities outside his trademark work.

Case 1
For a client owning rights to a mark in more than 100 countries, but not the corresponding domain name, Joop successfully conducted the action to acquire the domain name. After winning this action and following opposition by the domain name holder at national level, Joop conducted negotiations with the domain name holder and finally obtained the domain name for a lower price than had been offered in the first place.

Case 2
For a foreign client in the field of plant protection products Joop successfully defended the client against a number of European multinationals in this field. By making it clear that these are products which are only made available to highly trained users, it was possible to demonstrate that there was no danger of confusion among this specific group of users.

Telephone: +31 20 301 3500