Rockwell Model 18R calculator Designer (Person) Unknown Manufacturer Rockwell International Date 1976
Petrous PRMC-1 calculator Designer (Person) Unknown Manufacturer Petrous Electronic Corp Date 1970 - 1999 (circa)
Portadyne transistor radio Designer (Person) Hofmeister, Illes Manufacturer Dynaport Radio and Television Manufactured for Portadyne Date 1962 (probably)