| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6636c748ea68e9124b989ebc2e40f861 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04B11-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04B11-00 |
| filingDate |
1978-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2387bdbe865fe8f056d8a38968d14738 |
| publicationDate |
1979-10-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
DE-2816353-A1 |
| titleOfInvention |
METHOD FOR ACOUSTIC TRANSMISSION OF MESSAGE SIGNALS THROUGH THE GROUND |
| abstract |
The acoustic communications system sends messages via seismic pulses between a transmitter (12) and a receiver (14) coupled to the ground. The information is sent by varying the amplitude and/or frequency and/or phase of a defined signal. The signal is generated by a vibrator (12) whose amplitude, frequency and phase are variable and can be altered according to given functions. The signal is composed of a sequence of subsignals which in addition to being modulated with the information is also coded using e.g. a binary system. The subsignals consist of a sequence of frequencies and its inverse. The frequencies in the sequence have a constant amplitude. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6430208-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5677927-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7539237-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9634462-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5960031-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7321611-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6549567-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5963581-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5995534-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5687169-A |
| priorityDate |
1978-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |