If you were referring to the book "http://www.uesp.net/wiki/Oblivion:Tamrielic_Lore" then here's a list of the artifacts it mentions and if they're in Oblivion:
Lord's Mail:Seen in Arena, Daggerfall, and Morrowind. Not in Oblivion.
Ebony Mail:Seen in Arena, Daggerfall, and Morrowind. Not in Oblivion.
Spell Breaker:Seen in all of the games.
Spoiler Reward for Peryite's Daedric Shrine quest.
Chrysamere:Seen in Arena, Daggerfall, and Morrowind. Not in Oblivion.
Staff of Magnus:Seen in Arena, Daggerfall, and Morrowind. Not in Oblivion.
Warlock's Ring:Seen in Arena, Daggerfall, and Morrowind. Not in Oblivion.
Ring of Phynaster:Seen in Arena and Morrowind. Not in Oblivion.
Ring of Khajiit(i):Seen in all of the games.
Spoiler Reward for Meridia's Daedric Shrine quest.
Mace of Molag Bal:Seen in Daggerfall, Morrowind, and Oblivion.
Spoiler Reward for Molag Bal's Daedric Shrine quest.
Masque of Clavicus Vile:Seen in Daggerfall, Morrowind, and Oblivion.
Spoiler Reward for Clavicus Vile's Daedric Shrine quest.
Mehrunes Razor:Seen in Daggerfall, Morrowind, and Oblivion.
Spoiler REQUIRES the Mehrunes Razor official plugin. Obtained in the dungeon, Sundercliff Watch.
(Cuirass of the) Savio(u)r's Hide:Seen in Morrowind and Oblivion.
Spoiler Reward for Hircine's Daedric Shrine quest.
Spear of Bitter Mercy:Seen in Morrowind. Not in Oblivion.
Daedric Scourge:Seen in Battlespire and Morrowind. Not in Oblivion.
Bow of Shadows:Seen in Morrowind. Not in Oblivion.
Fists of Randagulf:Seen in Morrowind. Not in Oblivion:
Ice Blade of the Monarch:Seen in Morrowind. Not in Oblivion.
Ring of Surroundings:Seen in Morrowind. Not in Oblivion.
Boots of the Apostle:Seen in Morrowind. Not in Oblivion.
Mentor's Ring:Seen in Morrowind. Not in Oblivion.
Ring of the Wind:Seen in Morrowind. Not in Oblivion.
Vampiric Ring:Seen in Morrowind. Not in Oblivion.
Eleidon's Ward:Seen in Morrowind. Not in Oblivion.
Staff of Hasedoki:Seen in Morrowind. Not in Oblivion.
Bloodworm Helm:Seen in Morrowind and Oblivion.
Spoiler Obtained during the Mages Guild quest "The Bloodworm Helm," but you will lose the helm forever if you complete this quest.
Dragonbone Mail:Seen in Morrowind. Not in Oblivion.
Skull Crusher:Seen in Morrowind. Not in Oblivion.
Goldbrand:Seen in Morrowind and Oblivion.
Spoiler Reward for Boethia's Daedric Shrine quest.
Fang of Haynekhtnamet:Seen in Morrowind. Not in Oblivion.
Umbra (Sword):Seen in Morrowind and Oblivion.
Spoiler The objective of Clavicus Vile's Daedric Shrine quest. You must choose between this and the Masque of Clavicus Vile.
Denstagmer's Ring:Seen in Morrowind. Not in Oblivion.
Helm of Oreyn Bearclaw:Seen in Morrowind and Oblivion.
Spoiler Reward for the Fighters Guild quest "The Hist."
Daedric Crescent Blade:Seen in Morrowind. Not in Oblivion.
So basically, it should have been called "Morrowind Lore" because that game had every artifact. Oblivion really got screwed in regards to that book.
That's not to say that Oblivion is not without its own set of unique artifacts though:
http://www.uesp.net/wiki/Oblivion:Artifacts