If you use assistive technology (such as a screen reader) and need a
version of this document in a more accessible format, please email firstname.lastname@example.org.
Please tell us what format you need. It will help us if you say what assistive technology you use.
Patent decision O/167/86 in the matter of application by Bucher-Guyer AG Maschinenfabrik to amend specification of Patent 1302844 in the matter of opposition thereto by P J Zweegers en Zonen BV dated 18 November 1986.