| Number | Name | Date | Kind |
|---|---|---|---|
| 3541308 | Ruby | Nov 1970 | |
| 3575586 | Kroll | Apr 1971 | |
| 3760160 | Gieringer et al. | Sep 1973 | |
| 4034193 | Jackson | Jul 1977 | |
| 4228519 | Pfeifer | Oct 1980 | |
| 4275272 | Mennino, Jr. et al. | Jun 1981 | |
| 4310890 | Trehn et al. | Jan 1982 |
| Entry |
|---|
| Advertising Materials for "Attendant II" by Southern Specialties Corporation. |
| Advertisement of Telxon Corporation for a Hand Held Data Terminal. |
| Advertisement of P.O.M., Inc. for the "Ticfak" Electronic Multispace Parking Meter. |
| Advertisement of Kilpatrick Communications and Controls Entitled, "A New Concept in Parking". |