| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1af8df51ce24ca931ae718fb747f6aa0 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-0033
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-09
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B3-705 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B3-70
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-0033
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-09 |
| filingDate |
1987-11-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1990-11-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_583b1d705b089a17911ed421efe1f795
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4f441074b42206662578ba6ee61f747c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a9acefeddec3279297461cf3c6e3dd8a |
| publicationDate |
1990-11-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4972402-A |
| titleOfInvention |
Optical card |
| abstract |
An optical card has a track portion and a track groove portion as the guide groove on a substrate which can be irradiated with coherent light in shape of a spot to detect the tracking signal from its reflected light, characterized in that the reflectance at the track groove portion is formed lower than the reflectance at the track portion. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5389475-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5396483-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7185814-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6986861-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5312714-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5216665-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6541186-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5199024-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6146741-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6707787-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004159707-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5586110-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004141456-A1 |
| priorityDate |
1986-11-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |