Inventor
SCHOMANN KLAUS D
DE18 patents
⚠️ This page may combine multiple inventors who share the name “SCHOMANN KLAUS D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BASF AG
16 patentsUS5084592AJan 28, 1992
Azulenesquaric acid dyes, azulene intermediates therefor, and optical recording medium
BASF AG9 citations73
US4966798AOct 30, 1990
Optical recording medium
BASF AG9 citations73
US4670332AJun 2, 1987
Irreversible optical medium for information storage, and its production
BASF AG17 citations73
US4187521AFeb 5, 1980
DC erase head
BASF AG17 citations73
US4712148ADec 8, 1987
Magnetic tape cassette with equalization of electrostatic charges
BASF AG9 citations72
US5093492AMar 3, 1992
Methine dyes and optical recording medium containing same
BASF AG15 citations71
US4990649AFeb 5, 1991
Azulenesquaric acid dyes that contain urethane groups
BASF AG6 citations71
US5221751AJun 22, 1993
Heterocyclic polymethine dyes with carbamate or amide groups
BASF AG3 citations62
US5169975ADec 8, 1992
Binary azulenesquaric acid dyes, their intermediates and optical recording medium
BASF AG2 citations62
US5122435AJun 16, 1992
Amido-containing azulene squaric acid dyes, intermediates therefor and optical recording medium
BASF AG6 citations62
US4830951AMay 16, 1989
Naphtholactamsquaric acid dyes and optical recording materials containing these dyes
BASF AG4 citations62
US4348698ASep 7, 1982
Magnetic devices for changing video recordings
BASF AG6 citations62
US5087727AFeb 11, 1992
A zulenes containing a urethane group
BASF AG1 citations52
US5064702ANov 12, 1991
Quinoxalinepentamethine dyes and optical recording medium containing same
BASF AG0 citations52
US4751601AJun 14, 1988
Tape guide system for magnetic tapes, especially video tapes
BASF AG1 citations51
US5235573AAug 10, 1993
Repositioning laser beams in information storage media
BASF AG0 citations48