Number | Date | Country | Kind |
---|---|---|---|
91 A 000815 | Mar 1991 | ITX |
Number | Name | Date | Kind |
---|---|---|---|
3558542 | McDonald | Jan 1971 | |
4741860 | Hartman | Mar 1988 | |
4981730 | Zaleski | Jan 1991 |
Number | Date | Country |
---|---|---|
0207475 | Sep 1986 | JPX |
1-256549 | Aug 1989 | JPX |
Entry |
---|
JP-A-59 004 637 (Mitsubishi Petrochem K.K.) Jan. 11, 1984-Abstract. |
JP-A-62 001 589 (Ricoh K.K.) Jan. 7, 1987-Abstract. |