Since then his furniture has been produced by companies such as Metaform, Leolux, Spectrum Design Eindhoven, Kembo, Auping and Ahrend.
The Kokke chair designed in 1984, was first produced in series by Metaform in 1988 and can now be found in the permanent collection of the Stedelijk Museum Amsterdam.
[7] Four years later, in 1992, Kokke designed the Kokkestok, a walking stick which is easy to use because of the long curl, the stiff end and the rubber strip on the side.
[8] Several other furniture designs followed, often in commission, such as the chairs for the restaurant of the Province House in Groningen in 1991, the Next bed for Auping (1996) and the Ahrend Run sofa (2009).
In 2013 he developed Zami, an ergonomically designed stool, in close cooperation with the orthopaedic surgeon Piet van Loon.