Anyone have a list of 70's and 80's Public Domain movies (from the Horror/Scifi genres if possible)?

I work on Chiller Theater with Ned The Dead and all of the movies he has are older PD movies (like Horror Express, The Corpse Grinders, The House on Haunted Hill, Plan 9 From Outer Space and Night of the Living Dead) and he is looking for newer 70's and 80's PD movies to show. Looking for everything from Slasher to horror to scifi to fantasy movies from this era in the PD.

I found these movies on more then one "pubic domain" movie list and was curious as to how I can verify if these are indeed free to use over the air.

Alice Sweet Alice; Holy Terror; Communion (1976) 1hour 52 minutes
Black Six, The(1974) 1 hour 31 minutes
Dripping Deep Red(1975) 1 hour 40 minutes
God Told Me To, Demon(1976) 1 hour 29 minutes
Impulse(1974) 1 hour 25 minutes
Infra-Man(1976) 1 hour 32 minutes
Invasion Of The Bee Girls(1973) 1 hour 28 minutes
Octaman(1971) 1 hour 19 minutes
Phenomena(1985) 1 hour 50 minutes
Satan's School For Girls(1973) 1 hour 14 minutes

ABSOLUTION
Suspense/Drama/Horror Color 95m 1981

BLOOD TIDE
Horror Color 82m 1982
AKA: THE RED TIDE.

BRAIN MACHINE, THE
Science-Fiction Clr 90 min 1983 G

DAWN OF THE MUMMY
Horror Color 93m 1982

DEADTIME STORIES
Horror Color 93m 1986

DEVIL MASTER, THE
Horror Color 91 1983

DON'T OPEN TILL CHRISTMAS
Horror Color 86m 1984

DRILLER KILLER
Horror Color 78m 1974

DRIVE-IN MASSACRE
Horror Color 78m 1974

EMBRYO
Science-Fiction Color 104 min 1976 PG

FANTASTIC PLANET, THE
Animated/Sci-Fi Color 72m 1973

FRIGHTMARE
Horror Color 86m 1974

FUNERAL HOME
Horror Color 93m 1982
AKA: CRIES IN THE NIGHT.

GALAXY INVADER
Sci-Fi Color 90m 1985

HANGAR 18
Sci-Fi Color 93m 1980

JUST BEFORE DAWN
Horror Color 90m 1971

KILLING KIND, THE
Horror Color 95m 1973

MAMA DRACULA
Horror Color 90m 1980

MEDUSA
Horror/Suspense Color 103m 1974

MESSIAH OF EVIL
Horror Color 90m 1983

METAMORPHOSIS
Sci-Fi/Animated Color 96m 1990

NAKED MASSACRE
Horror/Suspense Color 90m 1976

OASIS OF THE ZOMBIES
Horror Color 75m 1982

SCREAM BLOODY MURDER
Horror Color 90m 1972

SEDUCERS, THE
Horror/Drama Color 91m 1976

SILENT NIGHT BLOODY NIGHT
Horror Color 90m 1973

SLASHED DREAMS
Horror Color 74m 1974

SOMEONE BEHIND THE DOOR
Suspense/Drama/Horror Color 97m 1971

SURROGATE, THE
Suspense/Drama/Horror Color 95m 1984

SURVIVAL EARTH
Sci-Fi Color 90m 1979

SUSPIRIA
Horror Color 97m 1977
AKA: CREEPERS

TUAREG: DESERT WARRIOR
Sci-Fi Color 97m 1983

UFO: TARGET EARTH
Sci-Fi Color 80m 1974

UNSANE
Horror/Suspense Color 91m 1982
AKA: TENEBRAE

WHO?
Sci-Fi Color 93m 1974
AKA: ROBO MAN.

Hi, you never got back to me on Freakylinks. I gave you a list of 4 and 5 disc sets to trade for the 4 disc Freakylink set.