It’s a flexi® – the original Retractable Leash since 1973 #shorts
The first usable and mass-produced retractable leash was invented and designed by Manfred Bogdahn in 1972. One year later he …
source

The first usable and mass-produced retractable leash was invented and designed by Manfred Bogdahn in 1972. One year later he …
source