| Yrjö Holopainen | |
| Kriemhildstr. 6 | |
| 44793 Bochum | |
| Germany | |
| Mobile: | +49 173 544 8018 |
| Email: | yh@yhsys.com |
| General inquiries: | info@yhsys.com |
| Web site: | www.yhsys.com |
The best way to contact YH Systems, Yrjö Holopainen is via email.
The sales tax identification number according to § 27 a of Umsatzsteuergesetz: DE249196624