Marking and Counting Device
Original Publication Date: 1978-Apr-01
Included in the Prior Art Database: 2005-Feb-20
As shown in the elevation of Fig. 1 and the exploded view of Fig. 2, the device includes a housing 4 which is similar to a ballpoint pen, a marking stylus 5, a set of contacts 6A and 6B, a spring retainer 7, a return spring 8, a set of wires 9, a counting device 10 and a power source 11.