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5220345 | Hirosawa | Jun 1993 | |
5719609 | Hauck et al. | Feb 1998 | |
5880748 | Childers et al. | Mar 1999 | |
5923353 | Boyd et al. | Jul 1999 | |
5992990 | Childers et al. | Nov 1999 | |
6039442 | Hagiwara et al. | Mar 2000 |
Entry |
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Patent Application: Serial Number: 08/718,615; “A Fail-Safe, Backup Valve In A Pressurized Ink Delivery Apparatus”; Boyd et al.; filed Sep. 23, 1996. |