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1. WO2021046539 - HÉLICE

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International application No. Applicant's or agent's file reference
PCT/US2020/049752 214/226PCT
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
08 September 2020 05 September 2019
RUSSELL, Thomas, A.
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.


     F04D 29/38 (2006.01)i; F04D 29/32 (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: propeller, hub, axis, blade, root, tip, leading edge, trailing edge, thrust surface, reference cone, vertex, base, generator line, angle, imaginary cylinder


Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
US 4362468 A (NISHIKAWA et al.) 07 December 1982 abstract, column 2, line 58 - column 5, line 5, and figures 1-6
US 2009-0314698 A1 (HIGBEE, ROBERT W.) 24 December 2009 paragraphs [0051]-[0074] and figures 3A-6B
US 2010-0215492 A1 (DOMENECH BARCONS, SALVADOR) 26 August 2010 paragraphs [0063]-[0073] and figures 1a-2c
US 2009-0226323 A1 (SUZUKI, MASAHIKO) 10 September 2009 paragraphs [0086]-[0116] and figures 12-22
US 4959571 A (YASUMOTO et al.) 25 September 1990 claims 1-15 and figures 4-6
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 4362468 A
07 December 1982
BR 7800516 A
DE 2803468 A1
DE 2803468 C2
FR 2378962 A1
FR 2378962 B1
GB 1595134 A
JP 53-093407 A
JP 54-013003 A
JP 59-049437 B2
US 4218190 A
US 4227868 A
US 4358244 A
12 September 1978
03 August 1978
06 March 1986
25 August 1978
17 February 1984
05 August 1981
16 August 1978
31 January 1979
03 December 1984
19 August 1980
14 October 1980
09 November 1982
US 2009-0314698 A1
24 December 2009
AU 2009-259850 A1
AU 2009-259850 B2
BR PI0909929 A2
BR PI0909929 B1
CA 2728088 A1
CA 2728088 C
EP 2300136 A1
EP 2300136 B1
US 8328412 B2
WO 2009-155548 A1
ZA 201100055 B
23 December 2009
13 June 2013
20 October 2015
19 February 2019
23 December 2009
28 February 2017
30 March 2011
15 August 2018
11 December 2012
23 December 2009
26 October 2011
US 2010-0215492 A1
26 August 2010
EP 2236818 A2
EP 2236818 B1
ES 2338835 A1
ES 2338835 B1
WO 2009-050663 A2
WO 2009-050663 A3
WO 2009-050663 A4
06 October 2010
04 December 2013
12 May 2010
18 February 2011
23 April 2009
08 April 2010
24 June 2010
US 2009-0226323 A1
10 September 2009
AU 2006-309773 A1
AU 2006-309773 B2
BR PI0619723 A2
BR PI0619723 B1
CA 2627984 A1
CA 2627984 C
CN 101300169 A
CN 101300169 B
DK 1953083 T3
EP 1953083 A1
EP 1953083 B1
ES 2444512 T3
JP 2007-125914 A
JP 2008-063943 A
JP 5161423 B2
JP 5372319 B2
KR 10-0971937 B1
KR 10-2008-0071569 A
RU 2008121964 A
RU 2385255 C2
US 8371819 B2
WO 2007-052626 A1
10 May 2007
28 April 2011
11 October 2011
12 June 2018
10 May 2007
24 August 2010
05 November 2008
15 June 2011
06 January 2014
06 August 2008
18 September 2013
25 February 2014
24 May 2007
21 March 2008
13 March 2013
18 December 2013
23 July 2010
04 August 2008
10 December 2009
27 March 2010
12 February 2013
10 May 2007
US 4959571 A
25 September 1990
DE 3907565 A1
DE 3907565 C2
JP 01-232198 A
JP 07-049800 B2
19 October 1989
22 October 1992
18 September 1989
31 May 1995
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:
11 December 2020
Date of mailing of the international search report:
18 December 2020
Authorized officer:
BAHNG, Seung Hoon
Telephone No. +82-42-481-5560
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