▁a ▁" comm ission er " ▁in ▁the ▁Tre lo ar ▁Bill ), ▁and ▁to ▁expand ▁prote ctions ▁for ▁public ▁performance ▁of ▁copy right ed ▁works , ▁including ▁music , ▁for ▁the ▁first ▁time . ▁ ▁The ▁bill ▁would ▁have ▁also ▁extended ▁the ▁term ▁of ▁copy right ▁by ▁ 2 2 ▁years , ▁from ▁ 2 4 ▁years ▁and ▁a ▁ 1 4 - year ▁extension ▁( 3 8 ▁years ) ▁to ▁ 4 0 ▁years ▁and ▁a ▁ 2 0 - year ▁extension ▁( 6 0 ▁years ). ▁The ▁law ▁would ▁have ▁extended ▁the ▁manufact uring ▁clause ▁of ▁the ▁ 1 8 9 1 ▁International ▁Copy right ▁Act ▁to ▁include ▁most ▁items ▁ex cluded ▁in ▁ 1 8 9 1 , ▁including ▁music , ▁maps , ▁etc . ▁ ▁The ▁bill ▁was ▁extens ively ▁critic ized ▁in ▁the ▁press , ▁especially ▁for ▁extending ▁the ▁manufact uring ▁clause , ▁and ▁was ▁strongly ▁opposed ▁by ▁copy right ▁le agues ▁formed ▁by ▁authors ▁and ▁publish ers . ▁The ▁bill ▁was ▁the ▁subject ▁of ▁extensive ▁lo bb ying ▁efforts ▁from ▁both ▁supp or ters ▁and ▁oppon ents . ▁Although ▁it ▁didn ' t ▁make ▁it ▁out ▁of ▁the ▁Committee ▁on ▁Pat ents , ▁some ▁of ▁its ▁prov isions ▁did ▁later ▁pass . ▁ ▁See ▁also ▁▁ ▁International ▁copy right ▁ ▁References ▁ ▁S ources ▁ ▁Rosen , ▁Z vi ▁S ., ▁" The ▁Tw il ight ▁of ▁the ▁Opera ▁Pir ates : ▁A ▁Pre history ▁of ▁the ▁Right ▁of ▁Public ▁Performance ▁for ▁Musical ▁Compos itions ".