Oscillating-foil type underwater propulsor with a joint
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jun 29, 2010
Grant Date -
Jul 30, 2009
app pub date -
Oct 9, 2008
filing date -
Jan 24, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An oscillating-foil type underwater propulsor with a joint provided in the invention, the propulsor including a streamline foil having a foil surface being parallel to a water surface and a span length of at least twice as long as an average chord length of the streamline foil, and a heaving mechanism undergoing heaving motion perpendicular to a propulsion direction of the propulsor and having a transmission section, wherein the transmission section is pivotally connected to the streamline foil to form a joint, the joint being provided at the middle of the span length and having a rotation center located within a circular area, which has a radius of one third of the average chord length and is centered at the point one third of the average chord length ahead of the lifting center of the streamline foil.
First Claim
all claims..Other Claims data not available
Family
Country | kind | publication No. | Filing Date | Type | Sub-Type |
---|---|---|---|---|---|
TW | B | TWI340711 | Jan 24, 2008 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
GRANTED PATENT OR PATENT OF ADDITION | An underwater propulsor using an oscillating foil having an active joint | Apr 21, 2011 |
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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CHANG JUNG CHRISTIAN UNIVERSITY | 396 CHANG JUNG RD SEC 1 KWAY JEN TAINAN 71101 |
International Classification(s)

- 2008 Application Filing Year
- B63H Class
- 298 Applications Filed
- 210 Patents Issued To-Date
- 70.47 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Wu, Chun-Kai | Tainan, TW | 5 | 70 |
# of filed Patents : 5 Total Citations : 70 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 3 Citation Count
- B63H Class
- 6.85 % this patent is cited more than
- 15 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

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Apr 29, 2025 | AS | ASSIGNMENT | free format text: RELEASE BY SECURED PARTY;ASSIGNOR:MORGAN STANLEY SENIOR FUNDING, INC., AS COLLATERAL AGENT;REEL/FRAME:071127/0240 Owner name: X CORP. (F/K/A TWITTER, INC.), TEXAS Effective Date: Apr 29, 2025 |
Feb 20, 2025 | AS | ASSIGNMENT | free format text: RELEASE BY SECURED PARTY;ASSIGNOR:MORGAN STANLEY SENIOR FUNDING, INC.;REEL/FRAME:070670/0857 Owner name: X CORP. (F/K/A TWITTER, INC.), TEXAS Effective Date: Feb 20, 2025 |
Oct 27, 2022 | AS | ASSIGNMENT | free format text: SECURITY INTEREST;ASSIGNOR:TWITTER, INC.;REEL/FRAME:062079/0677 Owner name: MORGAN STANLEY SENIOR FUNDING, INC., MARYLAND Effective Date: Oct 27, 2022 free format text: SECURITY INTEREST;ASSIGNOR:TWITTER, INC.;REEL/FRAME:061804/0086 Owner name: MORGAN STANLEY SENIOR FUNDING, INC., MARYLAND Effective Date: Oct 27, 2022 free format text: SECURITY INTEREST;ASSIGNOR:TWITTER, INC.;REEL/FRAME:061804/0001 Owner name: MORGAN STANLEY SENIOR FUNDING, INC., MARYLAND Effective Date: Oct 27, 2022 |
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Feb 13, 2018 | I | Issuance | |
Jan 24, 2018 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Sep 08, 2016 | F | Filing | |
Sep 08, 2016 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:AGRAWAL, PARAG;SRIVASTAVA, UTKARSH;CHELLAPILLA, KUMAR;AND OTHERS;SIGNING DATES FROM 20140512 TO 20150218;REEL/FRAME:039678/0816 Owner name: TWITTER, INC., CALIFORNIA |
Mar 31, 2011 | PD | Priority Date |

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