Number | Name | Date | Kind |
---|---|---|---|
D262261 | Schumacher et al. | Dec 1981 | |
D272241 | Dahlgren, Jr. et al. | Jan 1984 | |
D272619 | Elmenyawi | Feb 1984 | |
D278706 | Yamagata et al. | May 1985 | |
D278807 | Perna | May 1985 |
Entry |
---|
Popular Science, 6/1979, p. 95, Programmable Thermostat (left of center). |
Number | Date | Country | |
---|---|---|---|
Parent | 524546 | Aug 1983 |