Number | Date | Country | Kind |
---|---|---|---|
146715 | Jul 1972 | CA |
This application is a continuation-in-part of copending application Ser. No. 375,617, filed July 2, 1973 now abandoned, which was a continuation-in-part of application Ser. No. 162,672, filed July 17, 1971, now abandoned.
The invention described herein was made in the course of work under grants or awards from the Department of Health, Education, and Welfare and the National Science Foundation.
Number | Date | Country | |
---|---|---|---|
Parent | 375617 | Jul 1973 | |
Parent | 162672 | Jul 1971 |