SN7440N TTL Dual 4 Input NAND Buffer - 7440 DM7440 - NOS

RCA CD40107BE 40107 Dual 2 Input NAND Buffer/Driver - NOS

Motorola MC832P MC832 DM932 Expandable Dual 4 Input Buffer - NOS

NTE74H40, TTL − High Speed, Dual 4−Input Positive NAND Buffer 14−Pin DIP

7401 TTL Quad 2 Input NAND Gate - NOS

2 pcs Sprague USN7440A TTL DUAL 4-INPUT POSITIVE NAND BUFFER 14 PIN DIP IC

7430 8 Input NAND Gate TTL - NOS

7403 TTL Quad 2 Input NAND Gate - NOS