Inventor
HARTUNG ALBERT F
3 patents
Patents
3 patentsUS4045814AAug 30, 1977
Method and apparatus for scrambling and unscrambling communication signals
SYSTEM DEV CORP122 citations92
US4019201AApr 19, 1977
Method and apparatus for scrambling and unscrambling communication signals
SYSTEM DEV CORP117 citations92
US4024576AMay 17, 1977
Method and apparatus for scrambling and unscrambling communication signals
SYSTEM DEV CORP8 citations70