Appeal 2007-2127
Reexamination Control No. 90/006,621
14. If no new character is found at the keyboard input, the routine restores
the registers and returns to executing the main program ("Restore the
Registers" and "RTI" blocks, Figure 10-2).
15. If a new character is found at the keyboard input, alphanumeric
characters are put into the buffer ("Place in Ring Buffer," Figure 10-2) and
control characters are handled by a special routine for that character
("Control Character Routines," Figure 10-2).
16. One of the control codes in the interrupt service routine is the delete
key to delete the last character in the buffer (page 276, program lines 39-47).
17. After the interrupt routine enters the character in the buffer or handles
a control character, the CPU returns to executing the Morse code program
where it was interrupted ("RTI" block, Figure 10-2).
18. The Morse code routine continues execution on code in the buffer
until the next interruption.
19. The main Morse code program and the interrupt service routine in
De Jong are separate programs at different locations in memory, as
illustrated by the diagram of an interrupt request (Chart 7-2, page 174).
Analysis
If the '604 patent discloses "multithreading," then De Jong also
discloses "multithreading" because it operates in the identical manner.
However, based on our claim interpretation, we will reverse the rejection
because De Jong does not disclose "multithreading" for the same reasons the
1982 application and '603 patent do not disclose "multithreading."
De Jong teaches a keyboard- and timer-activated interrupt system that
operates identically to the keyboard- and timer-activated interrupt system in
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