Railway dark territory switch automation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 7, 2017
Issued Date -
N/A
app pub date -
Oct 14, 2014
filing date -
Jan 2, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The system provides a railroad switch for use in un-signaled (dark) territory. In particular, the system includes a plurality of audio messages maintained on a discrete audio board, where a DTMF signal is validated, initializes the control of a switch, and triggers an audio board to report a correspondence condition, where the output of the audio board is checked by a relay status.
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International Classification(s)
- 2014 Application Filing Year
- B61L Class
- 197 Applications Filed
- 172 Patents Issued To-Date
- 87.31 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- B61L Class
- 0 % this patent is cited more than
- 8 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 7, 2028 |
