(12) United States Patent (10) Patent No.: US 6,994,452 B2 Rozenberg Et Al
USOO6994452B2 (12) United States Patent (10) Patent No.: US 6,994,452 B2 Rozenberg et al. (45) Date of Patent: Feb. 7, 2006 (54) LAMPS, LUMINAIRES AND LIGHTING (58) Field of Classification Search .................. 315/86; SYSTEMS 362/20, 86, 146, 152, 212, 216, 227, 228, 362/240, 244, 260,276, 278, 307, 334,347, (76) Inventors: Simon Grant Rozenberg, The Bothy 362/800, 802, 252, 540, 545; 340/815.45, 340/815.53, 815.54 House, Mentmore, Buckinghamshire See application file for complete Search history. LU7 OOG (GB); Ian Shaun Lawry, 18 Meteor Close, Woodley, Berkshire RG5 (56) References Cited 4NG (GB); George Alan Limpkin, 22 Hayes Mead, Ciltern Park, U.S. PATENT DOCUMENTS Berkhamstead, Hertfordshire HP141BU 4,435,743 A * 3/1984 Plumly ........................ 362/20 (GB) 4,677,533 A * 6/1987 McDermott et al. ........ 362/240 4,682,147 A 7/1987 Bowman ............... 340/815.45 4,929,866 A 5/1990 Murata et al. (*) Notice: Subject to any disclaimer, the term of this (Continued) patent is extended or adjusted under 35 U.S.C. 154(b) by 84 days. FOREIGN PATENT DOCUMENTS DE 299 139 30 U1 12/1999 (21) Appl. No.: 10/362,653 (Continued) Primary Examiner-Stephen Husar (22) PCT Filed: Aug. 24, 2001 Assistant Examiner-Hargobind S. Sawhney (74) Attorney, Agent, or Firm-Buckley, Maschoff & (86) PCT No.: PCT/GB01/03814 Talwalkar LLC S371 (c)(1), (57) ABSTRACT (2), (4) Date: Jun. 4, 2003 The invention relates to LED-based lamps, luminaires and (87) PCT Pub. No.: WO02/16826 lighting Systems for buildings particularly, though not exclu Sively, for providing emergency light in the event of power PCT Pub.
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