Number | Date | Country | Kind |
---|---|---|---|
3638389 | Nov 1986 | DEX |
This application is a continuation, of application Ser. No. 118,752, filed Nov. 5, 1987, now abandoned.
Number | Name | Date | Kind |
---|---|---|---|
3919661 | Buck | Nov 1975 | |
4446427 | Lovrenich | May 1984 | |
4560929 | Melnyk | Dec 1985 | |
4843259 | Weisshaupt | Jun 1989 |
Number | Date | Country |
---|---|---|
1287124 | Jan 1969 | DEX |
2356490 | Oct 1975 | DEX |
2552310 | May 1976 | DEX |
2618231 | Nov 1977 | DEX |
Entry |
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Electronics, vol. 45, No. 21, Oct. 9, 1972, pp. 119-120. |
"Electronic Measurements", 2nd Edition, 1952, pp. 332 and 333. |
Hewlett-Packard Journal, vol. 28, No. 1, Sep. 1976, pp. 9 and 15. |
International Journal of Electronics, vol. 55, Oct. 1983, pp. 625 to 630. |
Sensenbaugh, "Proximity Detector", IBM Technical Disclosure Bulletin, vol. 13, No. 18 (Jan. 1971), pp. 2230-2231. |
Number | Date | Country | |
---|---|---|---|
Parent | 118752 | Nov 1987 |