| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a7f1d2de15fa55f50c792fac17861388 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04M1-19
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04M1-68 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04M1-68
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04M1-19
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04M1-06 |
| filingDate |
1987-12-08^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1989-06-06^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_807f0a07f0c10650f8cacdeb96bd26fe |
| publicationDate |
1989-06-06^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4837819-A |
| titleOfInvention |
Security handset |
| abstract |
A security device for use with a telephone handset having a microphone and an ear transducer is disclosed. It is adapted to prevent eavesdropping while the handset is in an on-hook position. The security device is comprised of switching means disposed in the handset adapted to disable the transducers. The switching means is switched to a first state when the handset is placed within a first predetermined orientation corresponding to a secure mode and is switched to a second state when the handset is placed within a second predetermined orientation corresponding to an operative mode. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9158496-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H0744596-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4949375-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H02130059-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2013219525-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4942605-A |
| priorityDate |
1987-12-08^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |