The ENIAC patent did not issue until 1964 .
By 1967 Honeywell sued Sperry Rand in an attempt to break the ENIAC patents , arguing the ABC constituted prior art .
The ENIAC patent did not issue until 1964 , and by 1967 Honeywell sued Sperry Rand in an attempt to break the ENIAC patents , arguing the ABC constituted prior art .