| Number | Name | Date | Kind |
|---|---|---|---|
| 2806699 | Spooner | Sep 1957 | |
| 3363243 | Morley | Jan 1968 | |
| 3510631 | Weinberg | May 1970 | |
| 3544989 | MacCreadie | Dec 1970 | |
| 3676696 | Lev et al. | Jul 1972 | |
| 3678496 | Stalp | Jul 1972 | |
| 3784768 | Hunt | Jan 1974 | |
| 3916214 | Coble, Jr. et al. | Oct 1975 | |
| 3920940 | Brown et al. | Nov 1975 | |
| 3944763 | Beierwaltes | Mar 1976 | |
| 4109030 | Tamiz | Apr 1977 | |
| 4263736 | Beierwaltes et al. | Apr 1981 | |
| 4475016 | Berger | Oct 1984 | |
| 4476358 | Capecchi | Oct 1984 | |
| 4518266 | Dawley | May 1985 | |
| 4530105 | Rabinowitz | Jul 1985 |
| Number | Date | Country |
|---|---|---|
| 607156 | Nov 1978 | CHX |
| Entry |
|---|
| Tapeswitch Press-At-Any-Point Ribbon Switches, Tapeswitch Corp. of America, Jun. 1970. |