Laser therapy: Reimers & Janssen devices are proven worldwide. RJ-LASER – Pioneer in LLLT/HLLLT – Laser therapy since 1982 – Equipment: Laser Class 3B / Class 4, point laser, laser shower, scanner. Reimers & Janssen has been producing non-invasive medical devices for light and laser therapy since 1982. Experience and innovation have made us one of the leading manufacturers in Europe.