Much of that happened in the 70s, so unless you subscribed to Billboard, you were unlikely to have even heard about it.
But it is fun to look at the new vinyl reprints and see Zep lose credit for all **their** songs.
All the good zep songs are ripoffs.
Quoted from usandthem:
Are those songs that haven’t been litigated, have been litigated and found not to be rip offs, or songs that are legit originals?
Obviously the worst songs like "Tea For One", "The Crunge" or "Carouselambra" are solidly Zep (or they are so terrible that the original authors wish to remain anonymous)
It's OK to be a cover band, but it's not OK to claim you wrote all the songs.
Just looking through my XDP100, here are some that got recredited, I'm sure there are more:
"Trouble in Mind" Lightnin Hopkins
"Sunshine Woman" William Lincoln
"Sugar Mama" Tampa Red
"We're Gonna Groove" Ben E King
"Boogie With Stu" Richie Valens
"Bring It on Home" Dixon
"Black Mountain Side" English Folk Song from Bert Jansch
"You Shook Me" Dixon
"I Can't Quit You Baby" Dixon
"The Lemon Song" Burnnett
"Hey, Hey, What Can I Do" Little Richard
"How Many More Times" Memphis Minnie
"Travelling Riverside Blues" Robert Johnson
"Nobody's Fault but Mine" Blind Willie Johnson
"Gallows Pole" Leadbelly
"Babe, I'm Gonna Leave You" Anne Bredon
"In My Time of Dying" Josh White
"Since I've Been Loving You" Albert King
"When the Levee Breaks" Memphis Minnie
"Dazed and Confused" Jake Holmes
"Whole Lotta Love" Dixon
"Stairway to Heaven" Spirit
"Hats Off to (Roy) Harper" Bukka White
"How Many More Times" Burnette (Howling Wolf)
"Moby Dick" Bobby Parker
"Trampled Underfoot" Capt. Beefheart
"Custard Pie" Sleepy John Estes, Blind Boy Fuller & Sonny Boy Williamson