Inventor

GELDERLAND SIGRID MARIA ROMAN

NL3 patents

⚠️ This page may combine multiple inventors who share the name “GELDERLAND SIGRID MARIA ROMAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

KONINKL PHILIPS ELECTRONICS NV

2 patents

US6739255B2May 25, 2004

Stamp, method, and apparatus

KONINKL PHILIPS ELECTRONICS NV16 citations80

US7952285B2May 31, 2011

Metal halide lamp with cerium oxide seal

KONINKL PHILIPS ELECTRONICS NV0 citations47

GELDERLAND SIGRID MARIA ROMAN

1 patent

US8274224B2Sep 25, 2012

Metal halide lamp including ceramic sealing material

GELDERLAND SIGRID MARIA ROMAN0 citations40