See Metall Zug AG v. Carl Zeiss Meditec AG, IPR2020-01074, Paper 8 (P.T.A.B. Jan. 5, 2021). In the earlier proceeding, the PTAB denied the petitioner's request to replace its filed petition with a 238 page "unabridged" petition because of the "unabridged" petition's "extraordinary length." Nearly four months after that denial, the petitioner filed four follow-on petitions challenging the claims of the '330 Patent, including the petition in the IPR2020-01074 proceeding. The PTAB explained that "[s]tanding alone, the sheer number of petitions (five), taken together with Petitioner's unexplained and significant delay in filing the four follow-on petitions supports an exercise of our discretionary