| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_94fff2216f5a387cfbeff2f1a7331cd4 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04Q5-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04M19-02 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04M19-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04Q5-08 |
| filingDate |
1970-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1972-05-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_57c90e0aeab402bff5ed85ef1651804e |
| publicationDate |
1972-05-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-3662116-A |
| titleOfInvention |
Subscriber superimposed signaling unit |
| abstract |
Ringing control tone is provided to operate the ringing circuit of any one of a plurality of party line subscribers. Ringing depends upon operation of control relays which direct signals with a superimposed dc of one or the other polarity on the tip or ring side of the called subscriber''s line. The control relays are locked in position on operation of the relay which provides ring tone. In this way ''''bell tap,'''' or ''''cross ringing,'''' is prevented. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5602911-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4310723-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4224476-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4056694-A |
| priorityDate |
1970-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |