| Number | Name | Date | Kind |
|---|---|---|---|
| D112991 | Faris | Jan 1939 | |
| D161941 | Kress | Feb 1951 | |
| D199578 | Anano et al. | Nov 1964 | |
| D210089 | Vickery | Feb 1968 | |
| 2617706 | Jeffrey | Nov 1952 | |
| 2645551 | Sprecker | Jul 1953 | |
| 2838361 | Findlay et al. | Jun 1958 | |
| 2874020 | Esler | Feb 1959 | |
| 3409903 | Williams | Nov 1968 | |
| 3541574 | Weiss | Nov 1970 | |
| 4003307 | Sano et al. | Jan 1977 | |
| 4333085 | Witts | Jun 1982 | |
| 4899173 | Elliano | Feb 1990 | |
| 5136937 | Nogawa | Aug 1992 |
| Number | Date | Country |
|---|---|---|
| 869094 | Aug 1990 | JPX |
| Entry |
|---|
| Electronic Time Recorder, PIX-3000 Series, Operation Manual, 3 pps. Amano Corporation, 1991. |
| Star Systems, Inc., "Star Model-72 Electronic Time & Date Recorder," 2 page brochure, Houston, Tex. |
| Electronic Time Recorder, PIX-10 Series, Opeartion Manual, 4 pps. Amano Cincinnati Inc., 1993. |
| Simplex Time Recorder Co., "Centennial Installation, Operating and Programming Instructions," Manual, 26 pps., 1988. |