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International application No. Applicant's or agent's file reference
PCT/US2018/043020 314707-2
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
20 July 2018 12 September 2017
FOR FURTHER ACTION: See Form PCT/ISA/220 as well as, where applicable, item 5 below.
This international search report has been prepared by this International Searching Authority and is transmitted to the applicant according to Article 18. A copy is being transmitted to the International Bureau.
It is also accompanied by a copy of each prior art document cited in this report.
1. Basis of the report
a. With regard to the language, the international search was carried out on the basis of:
the international application in the language in which it was filed.
a translation of the international application into                                          which is the language of a translation furnished for the purposes of international search (Rules 12.3(a) and 23.1(b)).
This international search report has been established taking into account the rectification of an obvious mistake authorized by or notified to this Authority under Rule 91 (Rule 43.6bis(a)).
With regard to any nucleotide and/or amino acid sequence disclosed in the international application, the international search was carried out on the basis of a sequence listing:
2. Certain claims were found unsearchable
3. Unity of invention is lacking
4. Title of the invention
The text is approved as submitted by the applicant.
The text has been established by this Authority to read as follows:
5. Abstract
The text is approved as submitted by the applicant.
The text has been established, according to Rule 38.2, by this Authority as it appears in Box No. IV. The applicant may, within one month from the date of mailing of this international search report, submit comments to this Authority.
6. Drawings
The figure of the drawings to be published with the abstract is Figure No.     1    
as suggested by the applicant.
as selected by this Authority, because the applicant failed to suggest a figure.
as selected by this Authority, because this figure better characterizes the invention.
none of the figures is to be published with the abstract.


     B61L 29/00 (2006.01)i; B61L 23/04 (2006.01)i; G01V 8/10 (2006.01)i
According to International Patent Classification (IPC) or to both national classification and IPC


Minimum documentation searched (classification system followed by classification symbols):
Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched:
Korean utility models and applications for utility models
Japanese utility models and applications for utility models
Electronic data base consulted during the international search (name of data base and, where practicable, search terms used):
eKOMPASS(KIPO internal) & Keywords: grade crossing, railway monitoring, sensor, signage, co-located, area, analytics, and similar terms.


Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
US 5825412 A (GREGORY HOBSON et al.) 20 October 1998 See column 3, line 6 - column 5, line 16; claims 1, 8, and 14; and figure 3.
US 2012-0181390 A1 (AHTASHAM ASHRAF et al.) 19 July 2012 See paragraph [0003]; claim 31; and figure 1.
WO 2014-059487 A1 (SIEMENS LTD.) 24 April 2014 See page 10, line 12 - page 11, line 32; and figure 1.
US 2016-0189552 A1 (THE ISLAND RADAR COMPANY) 30 June 2016 See paragraphs [0060]-[0065]; claim 1; and figures 1-4.
US 2015-0323663 A1 (ROBERT BOSCH GMBH) 12 November 2015 See paragraphs [0037]-[0046] and figures 1-2.
Special categories of cited documents:
document defining the general state of the art which is not considered to be of particular relevance
document cited by the applicant in the international application
earlier application or patent but published on or after the international filing date
document which may throw doubts on priority claim(s) or which is cited to establish the publication date of another citation or other special reason (as specified)
document referring to an oral disclosure, use, exhibition or other means
document published prior to the international filing date but later than the priority date claimed
later document published after the international filing date or priority date and not in conflict with the application but cited to understand the principle or theory underlying the invention
document of particular relevance; the claimed invention cannot be considered novel or cannot be considered to involve an inventive step when the document is taken alone
document of particular relevance; the claimed invention cannot be considered to involve an inventive step when the document is combined with one or more other such documents, such combination being obvious to a person skilled in the art
document member of the same patent family


Patent document cited in search report Publication date
Patent family member(s) Publication date
US 5825412 A
20 October 1998
US 2012-0181390 A1
19 July 2012
AT 549228 T
CA 2710041 C
CA 2710041 A1
CA 2710038 C
CA 2710038 A1
EP 2125482 A1
EP 2125483 A4
EP 2125483 B1
EP 2125482 A4
EP 2125483 A2
EP 2125482 B1
US 8028961 B2
US 8157219 B2
US 8469320 B2
US 8517316 B2
US 8888052 B2
US 9067609 B2
US 2008-0169385 A1
US 2008-0183306 A1
US 2012-0132758 A1
US 2013-0277506 A1
US 2013-0341468 A1
WO 2008-080175 A3
WO 2008-080169 A1
WO 2008-080175 A2
15 March 2012
07 June 2016
03 July 2009
10 November 2015
03 July 2008
02 December 2009
12 January 2011
14 March 2012
19 January 2011
02 December 2009
14 May 2014
04 October 2011
17 April 2012
25 June 2013
27 August 2013
18 November 2014
30 June 2015
17 July 2008
31 July 2008
31 May 2012
24 October 2013
26 December 2013
21 August 2008
03 July 2008
03 July 2008
WO 2014-059487 A1
24 April 2014
US 2016-0189552 A1
30 June 2016
US 2015-0323663 A1
12 November 2015
CN 105083342 A
DE 102014208522 A1
US 9950723 B2
25 November 2015
12 November 2015
24 April 2018
Name and mailing address of the ISA/:
Korean Intellectual Property Office
189 Cheongsa-ro, Seo-gu, Daejeon Metropolitan City, 302-701
Republic of Korea
Facsimile No. +82-42-481-8578
Date of the actual completion of the international search:
07 November 2018
Date of mailing of the international search report:
07 November 2018
Authorized officer:
NHO, Ji Myong
Telephone No. +82-42-481-8528
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