Inventor
FRECSKA SANDOR A
US11 patents
⚠️ This page may combine multiple inventors who share the name “FRECSKA SANDOR A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ARMSTRONG WORLD IND INC
5 patentsUS6329908B1Dec 11, 2001
Addressable speaker system
ARMSTRONG WORLD IND INC413 citations98
US6715246B1Apr 6, 2004
Ceiling tile transmitter and receiver system
ARMSTRONG WORLD IND INC65 citations96
US5347783ASep 20, 1994
Prenotched fire-rated runner
ARMSTRONG WORLD IND INC23 citations92
US6693512B1Feb 17, 2004
Device location and identification system
ARMSTRONG WORLD IND INC49 citations91
US5313750AMay 24, 1994
Fire-rated runner
ARMSTRONG WORLD IND INC17 citations73