Comde-Derenda GmbH
Kieler Strasse 9
14532 Stahnsdorf

Telephone: +49 3329 69027-10
Telefax: +49 3329 69027-29

Managing Director:
Dipl.-Ing. Norbert Derenda

Norbert Derenda, Dipl. Ing.
Haro Derenda, M.Sc. forest.

Registered Office Location:
Court of Registration: Potsdam
Commercial Register No.: HRB 15282P

VAT Registration No.:
DE 159338185

Photo White Canes ©Ljupco Smokovski –
Photo Sensors ©Lumppini –
Photo Environmental Monitoring ©Sandra Knopp –
Photo "White Cane Repairs" ©Rido -

Webdevelopment & Support:
WordPress developer Julian Gapp

Disclaimer – Legal Notice

1 Limitation of Liability

The contents of this website are created with the utmost care. However, the provider does not guarantee the accuracy, completeness, or timeliness of the provided content. The use of the website’s content is at the user’s own risk. Contributions identified by name reflect the opinions of the respective author and not always the opinion of the provider. By simply using the provider’s website, no contractual relationship between the user and the provider is established.

2 External Links

This website contains links to third-party websites (“external links”). These websites are subject to the liability of the respective operators. The provider checked the external content for possible legal violations when the external links were first created. At that time, no legal violations were evident. The provider has no influence on the current and future design and content of the linked pages. The inclusion of external links does not mean that the provider endorses the content behind the reference or link. Continuous monitoring of the external links is not reasonable for the provider without specific indications of legal violations. However, if legal violations become known, such external links will be deleted immediately.

3 Copyright and Performance Protection Rights

The content published on this website is subject to German copyright and performance protection laws. Any use not permitted by German copyright and performance protection laws requires the prior written consent of the provider or respective rights holder. This applies in particular to the duplication, processing, translation, storage, processing, or reproduction of content in databases or other electronic media and systems. Content and rights of third parties are marked as such. The unauthorized duplication or distribution of individual content or complete pages is not permitted and is punishable by law. Only the production of copies and downloads for personal, private, and non-commercial use is permitted. The presentation of this website in external frames is only allowed with written permission.

4 Special Conditions of Use

If special conditions for individual uses of this website deviate from the aforementioned paragraphs, it will be explicitly stated at the appropriate place. In such cases, the special conditions of use apply to the respective individual case.