CN208909645U - Rack is thrown in unmanned plane express delivery and object device is thrown in unmanned plane express delivery - Google Patents
Rack is thrown in unmanned plane express delivery and object device is thrown in unmanned plane express delivery Download PDFInfo
- Publication number
- CN208909645U CN208909645U CN201820681863.3U CN201820681863U CN208909645U CN 208909645 U CN208909645 U CN 208909645U CN 201820681863 U CN201820681863 U CN 201820681863U CN 208909645 U CN208909645 U CN 208909645U
- Authority
- CN
- China
- Prior art keywords
- unmanned plane
- express delivery
- side plate
- rack
- thrown
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Warehouses Or Storage Devices (AREA)
Abstract
The utility model provides a kind of unmanned plane express delivery throwing rack, comprising: bottom plate;The first side plate and the second side plate for being fixed on the bottom plate and being oppositely arranged;Third side plate, it can be rotated between the first position and the second position, rack is thrown to close or open the unmanned plane express delivery, in the first position, the unmanned plane express delivery throwing rack is in closed state and the third side plate is abutted to the edge of one end of first side plate and second side plate, in the second position, the unmanned plane express delivery throw that rack is in the open state and the third side plate and the bottom plate in the same plane;And control device, for controlling the rotation of the third side plate.The utility model further relates to a kind of unmanned plane express delivery throwing object device, including rack and optical label are thrown in unmanned plane express delivery.
Description
Technical field
The utility model belongs to express delivery and delivers field more particularly to a kind of unmanned plane express delivery throwing rack.
Background technique
With the continuous development of e-commerce, delivery industry is also grown rapidly therewith, and requirement of the shopper to express delivery is also got over
Come higher.Currently, more large enterprise starts transport or transfer that express delivery is carried out using unmanned plane, but in general, nobody
Machine needs to rest in the spacious place of comparison to deliver quick despatch, this just needs addressee that fixed point is gone to take quick despatch, or needs
Special staff is arranged to carry out subsequent processing to realize the accurate delivery of quick despatch, that is to say, that unmanned plane delivers express delivery
It solves " nobody send part ", but solves " unmanned addressee " not yet.
Utility model content
Therefore, the purpose of this utility model is to provide a kind of unmanned plane express deliveries to throw rack, comprising:
Bottom plate;
The first side plate and the second side plate for being fixed on the bottom plate and being oppositely arranged;
Third side plate can rotate between the first position and the second position, fast to close or open the unmanned plane
Throwing rack is passed, in the first position, the unmanned plane express delivery throws rack and is in closed state and third side plate abutting
To the edge of one end of first side plate and second side plate, in the second position, rack is thrown in the unmanned plane express delivery
The in the open state and described third side plate and the bottom plate are in the same plane;And
Control device, for controlling the rotation of the third side plate.
Rack is thrown in unmanned plane express delivery according to the present invention, it is preferable that first side plate and second side plate can be consolidated
Determine to wall.
Rack is thrown in unmanned plane express delivery according to the present invention, it is preferable that first side plate and second side plate have respectively
There is a flanging, at least one screw hole is provided on the flanging.
Rack is thrown in unmanned plane express delivery according to the present invention, it is preferable that one end of first side plate and second side plate
Between be provided at least one crossbeam.
Rack is thrown in unmanned plane express delivery according to the present invention, it is preferable that the third side plate in addition to side where rotary shaft
At least one side be nearby provided with guardrail.
Rack is thrown in unmanned plane express delivery according to the present invention, it is preferable that is disposed with solar battery on the third side plate, is used
It powers in the control device.
Rack is thrown in unmanned plane express delivery according to the present invention, it is preferable that in the first position, the third side plate with it is described
Angle between bottom plate is 0 °~90 °.
Rack is thrown in unmanned plane express delivery according to the present invention, it is preferable that in the first position, the third side plate with it is described
Angle between bottom plate is 75 °.
The utility model additionally provides a kind of unmanned plane express delivery throwing object device comprising: rack and use are thrown in unmanned plane express delivery
In the optical label for guiding the unmanned plane.
Object device is thrown in unmanned plane express delivery according to the present invention, it is preferable that the optical label is separately provided.
Object device is thrown in unmanned plane express delivery according to the present invention, it is preferable that the optical label is arranged in the unmanned plane express delivery
It throws in rack.
Compared with prior art, the utility model realizes the precise positioning of unmanned plane, solves asking for " unmanned addressee "
Topic.
Detailed description of the invention
The utility model embodiment is described further referring to the drawings, in which:
Fig. 1 shows the method according to the present utility model for carrying out unmanned plane guiding by optical label.
Fig. 2-6 is that view of the rack under different conditions is thrown according to the unmanned plane express delivery of the utility model first embodiment;
Fig. 7-11 is that view of the rack under different conditions is thrown according to the unmanned plane express delivery of the utility model second embodiment;
And
Figure 12 is the bottom view that rack is thrown according to the unmanned plane express delivery being mounted on wall of the utility model embodiment,
In illustration be side view.
Specific embodiment
In order to make the purpose of this utility model, technical solution and advantage are more clearly understood, and pass through tool below in conjunction with attached drawing
The utility model is further described in body embodiment.It should be appreciated that specific embodiment described herein is used only for solving
The utility model is released, is not used to limit the utility model.
Optical communication apparatus (also referred to as optical label) can transmit different information by issuing different light.Cursor
The example of label includes, but are not limited to the applicant on August 30th, the 2017 International Application Serial No. PCT/CN2017/099642 submitted
With optical communication apparatus disclosed in PCT/CN2017/099645.Optical label has farther away identification distance, is carried out by optical label
The method of unmanned plane guiding can be as shown in Figure 1, it includes the following steps:
Step 101: control unmanned plane advances near target optical label.
After the cargo that unmanned plane gets buyer to be sent to, the shipping address of buyer can be flown to first (that is, buying
The apartment of family) near.In one embodiment, which preferably can be the geographical location letter of target optical label itself
It ceases (for example, the accurate longitude and latitude of optical label, elevation information etc.), and can also include other information, such as the target cursor
The orientation information etc. of label.
Step 101 can be realized with possible existing ways various in this field.For example, unmanned plane can pass through GPS
The modes such as navigation fly to the shipping address nearby (namely near optical label of buyer).Existing GPS navigation mode can reach
Tens meters of accuracy rating.In a step 101, it closes the relative position that also can use between other optical labels and target optical label
Unmanned plane is directed near target optical label by system.Relative positional relationship between each optical label can be for example previously stored
And it can be obtained by unmanned plane.Unmanned plane can identify other optical labels along its flight path in flight, and be somebody's turn to do
Relative positional relationship between other optical labels and target optical label, then, unmanned plane can determine other optical labels of itself and this
Between relative positional relationship (such as by way of inverted orientation), it is thus possible to determine target optical label and unmanned plane
Between relative positional relationship.Based on the relative positional relationship, unmanned plane can be directed near target optical label.This field
Technical staff, which is appreciated that, is also possible to that unmanned plane is directed near target optical label using the combination of above-mentioned various modes.
Step 102: the information of some optical label transmitting of surrounding being carried out by the CMOS camera installed on unmanned plane
Acquisition, and identify transmitted information.
After near the optical label for having flown to buyer, unmanned plane can search its optical label within the vision, and pass through
The CMOS camera installed thereon is acquired the information of the optical label transmitting found and identifies transmitted information.Example
Such as, unmanned plane can obtain the continuous multiple image of some optical label by its CMOS camera, and be directed to each frame image
Judge that part corresponding with the position of light source is with the presence or absence of striped on the image or there are which type of stripeds, and determines
Information represented by each frame image.In one embodiment, if unmanned plane has found a cursor at it within sweep of the eye
Label, but its information transmitted can not be identified due to hypertelorism, then unmanned plane can be suitably close to the optical label, with reality
The identification for the information that now optical label is transmitted.
Step 103: judging whether the optical label is target optical label based on the information transmitted.
The information that unmanned plane can be transmitted based on optical label judges whether the optical label is target optical label.For example, nothing
It is man-machine whether to may determine that in transmitted information explicitly or implicitly comprising above-mentioned predetermined information.If comprising can be with
Determine that the optical label is target optical label, otherwise, can determine the optical label not is target optical label.In one embodiment,
Can judge whether the optical label is target optical label by unmanned plane itself.In another embodiment, unmanned plane can incite somebody to action
The information that optical label is transmitted is transmitted to the server that can be communicated with unmanned plane, by the server based on the letter transmitted
Breath judges whether the optical label is target optical label, and judging result is sent to unmanned plane.The information of optical label transmitting can be with
It is encrypted information.
Step 104: if the optical label is target optical label, controlling unmanned plane and advance to the optical label.
Since unmanned plane has determined that some optical label in field range is air objective, unmanned plane can
For example free from errors to be flown to the optical label by the vision guide of the optical label.In one embodiment, unmanned plane can
To use existing ranging technology to stop at some distance of optical label, such as apart from tens centimetres of optical label of position
It sets, avoids collision optical label.In one embodiment, unmanned plane can be based on the vision of the image for the optical label that it takes
Distortion is to be reverse-located and be adjusted its flight line, so that unmanned plane can finally be stopped at relative to a certain of optical label
On direction, for example, the front of optical label.The shelf for receiving, unmanned plane can be disposed in the front of the optical label
Easily cargo can be delivered in the shelf.
Rack is thrown in the unmanned plane express delivery delivered for unmanned plane that lower mask body introduces the utility model, to solve automatic receive
The problem of goods.
First embodiment
- Fig. 6 referring to fig. 2, the unmanned plane express delivery for showing the first embodiment of the utility model throw rack in different conditions
Under view.It includes: bottom plate that rack is thrown in the unmanned plane express delivery of the first embodiment;The first side plate and second side being oppositely arranged
Plate;Third side plate between first side plate and one end of the second side plate is set;And it is arranged in the first side plate and the second side plate
The other end between first to third crossbeam;Wherein, solar battery is disposed on third side plate, and can be at first
Set and rotated between the second position, in first position, third side plate abut to the edge of the first side plate and the second side plate and with
Bottom plate is at such as 75 ° of angle, and express delivery throws rack and is in closed state, as shown in Fig. 2, the A and B of Fig. 2 are respectively closed state
Express delivery throw rack three-dimensional view and lateral plan.In the second position, in the same plane, express delivery is thrown for third side plate and bottom plate
Rack is in the open state, and as shown in Fig. 4, three-dimensional view and the side of rack are thrown in the express delivery that the A and B of Fig. 4 is in an open state respectively
Face view.It further includes control device and optical label that rack is thrown in the express delivery of the embodiment, and control device is for controlling third side plate
Folding, referring specifically to the B of Fig. 2, control device includes reception of wireless signals module 1, motor 2, connecting rod 4, sliding rail 5, wireless communication
Number receiving module 1 and motor 2 are mounted in motor box 7.When the optical label in rack is thrown in the camera scanning on unmanned plane, nothing
Line signal receiving module 1 can receive corresponding information, and motor 2 is caused to operate, and driven and connected by the rotation of the gear 3 in motor 2
Bar 4 rotates, and the other end of connecting rod 4 does circular motion on sliding rail 5 come the third side plate that expands, and referring to Fig. 3, the A and B of Fig. 3 divides
Not Wei the unmanned plane express delivery in opening procedure throw the three-dimensional view and lateral plan of rack, when in the other end and sliding rail 5 of connecting rod 4
Stop piece 6 when contacting, third side plate be in the second position, and it is (referring to fig. 4) in the open state that rack is thrown in express delivery, unmanned plane throwing
Lower cargo, after having received cargo, the third road side plate Zai Yuan closure.In this embodiment, control device is arranged in unmanned plane express delivery
The side of rack is thrown, optical label can be set on first crossbeam, and solar battery is powered to control device and optical label.This
Outside, in this embodiment, the first side plate and the second side plate are respectively provided with a flanging, for unmanned plane express delivery throwing rack to be fixed to
Wall specifically as shown in figures 2-6, is respectively set in this embodiment, on flanging there are three screw hole, by unmanned plane express delivery
When throwing rack and installing to the external wall of building, the flanging of the flanging of the first side plate and the second side plate is abutted respectively to wall, so
Screw hole, which is passed through, with screw afterwards is fixed to wall.
When express company will send part, notify client that will send part by communication devices such as mobile phone or computers first,
It obtains client and agrees to send executing unmanned plane again after the reply of part and sending part, delivery efficiency can be improved in this way and cut operating costs;
Furthermore it is also possible to which the delivery period being arranged according to client in online shopping carries out sending part without confirming in advance.
During unmanned plane sends part, firstly, unmanned plane is reached near shipping address using the navigation system of itself, then
Optical label precise positioning to the specific express delivery being arranged in rack is thrown using unmanned plane express delivery to throw near rack.At this point, unmanned plane
Unmanned plane express delivery throwing object can be given after client's confirmation the mobile phone that arrived the information for launching ground and be sent to by server client
The control device of frame sends instruction, to open the third side plate that rack is thrown in unmanned plane express delivery.When third side plate reaches the second position
When, third side plate is laid flat and collectively forms the landing platform of unmanned plane with bottom plate, with the landing for unmanned plane.The design is not only
It is the dispensing for quick despatch, additionally it is possible to the unmanned plane of landing and window be made to keep certain safe distance.When unmanned plane is placed
After lower cargo, flies away from express delivery and throw rack, unmanned plane as shown in Figure 5 flies away from the view that rack is thrown in express delivery, then can shoot
The photo of one dispensing that succeeded is sent to client, and client sends instruction to control device to be closed third side plate, third side
Plate is slowly closed.The closure degree of third side plate can be determined according to the size of quick despatch, it is ensured that quick despatch does not fall safely
It falls, view (be not shown therein cargo) of the third side plate of rack in closing course is thrown in unmanned plane express delivery as shown in FIG. 6.
Alternatively, the folding of third side plate directly transmits instruction by unmanned plane, i.e. unmanned plane is directly handed over control device
Mutually, rather than control device is sent instructions to by user.
Second embodiment
Referring to Fig. 7-Figure 11, the unmanned plane express delivery for showing the second embodiment of the utility model throws rack in different conditions
Under view.Rack is thrown in the unmanned plane express delivery of the embodiment and the difference of first embodiment is, there is no settings to exist for optical label
On the first crossbeam for throwing rack, but individually setting, the window of building is directly fixed on by seamless nail patch and plastic processing frame
On, as shown in Figure 7.The usage mode that rack is thrown in the unmanned plane express delivery of the embodiment is also identical for first embodiment.
It should be understood readily by those skilled in this art, the unmanned plane express delivery in the utility model is thrown in rack, first to third
Crossbeam is used for the fixation for assisting throwing rack, it is not necessary that the component of setting.
Other embodiments according to the present utility model, optical label is arranged on the first side plate or the second side plate, as long as being convenient for
The scanning of unmanned plane camera.
Other embodiments according to the present utility model, when installing unmanned plane express delivery throwing rack to wall outside window,
It is also supported using the A-frame of bottom, as shown in figure 12, Figure 12 shows the nothing according to the present utility model being mounted on wall
The bottom view of rack is thrown in man-machine express delivery, and illustration therein is side view.In addition to passing through the first side plate and the second side plate using screw
Flanging at least one screw hole be fixed to wall, throw rack bottom plate under be arranged two triangular support brackets, to enhance
Throw the firmness degree of rack.In addition, other embodiments according to the present utility model, the first side plate and the second side plate for throwing rack do not have
There is flanging for fixing, but is fixed to wall using other fixed forms well known in the art.
Other embodiments according to the present utility model, express delivery throw rack in the closure state, third side plate and bottom plate
Angle is less than 180 ° of any angle, preferably less than 90 °.
Other embodiments according to the present utility model, can be in third side plate except side where rotary shaft is (that is, third
Side plate it is adjacent with bottom plate while) except three while in one or more side near guardrail is set, for preventing cargo sliding
Unmanned plane express delivery is fallen on to throw except rack.It can be by the height for designing guardrail and position so that it will not influence unmanned plane
The closure and opening of flight and third side plate.
Other embodiments according to the present utility model, control device can be set in any position for throwing rack, Huo Zheshe
It sets in the outside for throwing rack.
Other embodiments according to the present utility model can not have solar panel, control device on third side plate
With optical label by other any power supply power supplies well known in the art, such as by mains-supplied.
In an embodiment of the present invention, any cursor that can be used in transmitting information to assist unmanned plane to position can be used
It signs (or light source).For example, being transmitted present invention may apply to the rolling shutter effect based on CMOS by different stripeds
The light source (such as disclosing optical communication apparatus described in CN104168060A in Chinese patent) of information, is readily applicable to
The optical label as described in patent CN105740936A, be readily applicable to it is various can be by CCD sensor devices to identify
The optical label of the information of transmitting, or it is readily applicable to the array of optical label (or light source).
Although the utility model has been described by means of preferred embodiments, the utility model is not limited to this
In described embodiment, further include made various changes and change in the case where not departing from the scope of the utility model
Change.
Claims (11)
1. rack is thrown in a kind of unmanned plane express delivery characterized by comprising
Bottom plate;
The first side plate and the second side plate for being fixed on the bottom plate and being oppositely arranged;
Third side plate can rotate between the first position and the second position, be thrown with closing or opening the unmanned plane express delivery
Rack, in the first position, the unmanned plane express delivery throwing rack is in closed state and the third side plate is abutted to institute
The edge for stating one end of the first side plate and second side plate, in the second position, the unmanned plane express delivery is thrown rack and is in
Opening state and the third side plate and the bottom plate are in the same plane;And
Control device, for controlling the rotation of the third side plate.
2. rack is thrown in unmanned plane express delivery according to claim 1, which is characterized in that first side plate and described second side
Plate is capable of fixing to wall.
3. rack is thrown in unmanned plane express delivery according to claim 2, which is characterized in that first side plate and described second side
Plate is respectively provided with a flanging, at least one screw hole is provided on the flanging.
4. rack is thrown in unmanned plane express delivery according to claim 1, which is characterized in that first side plate and described second side
At least one crossbeam is provided between one end of plate.
5. rack is thrown in unmanned plane express delivery described in any one of -4 according to claim 1, which is characterized in that the third side plate
Where the rotary shaft in addition at least one while near be provided with guardrail.
6. rack is thrown in unmanned plane express delivery described in any one of -4 according to claim 1, which is characterized in that on the third side plate
It is disposed with solar battery, for powering to the control device.
7. rack is thrown in unmanned plane express delivery described in any one of -4 according to claim 1, which is characterized in that at described first
It sets, the angle between the third side plate and the bottom plate is 0 °~90 °.
8. rack is thrown in unmanned plane express delivery according to claim 7, it is characterised in that in, in the first position, described the
Angle between three side plates and the bottom plate is 75 °.
9. object device is thrown in a kind of unmanned plane express delivery characterized by comprising
Rack is thrown in unmanned plane express delivery according to claim 1 to 8, and
Optical label, for guiding the unmanned plane.
10. object device is thrown in unmanned plane express delivery according to claim 9, which is characterized in that the optical label is separately provided.
11. object device is thrown in unmanned plane express delivery according to claim 9, which is characterized in that the optical label is arranged described
Unmanned plane express delivery is thrown in rack.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820681863.3U CN208909645U (en) | 2018-05-09 | 2018-05-09 | Rack is thrown in unmanned plane express delivery and object device is thrown in unmanned plane express delivery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820681863.3U CN208909645U (en) | 2018-05-09 | 2018-05-09 | Rack is thrown in unmanned plane express delivery and object device is thrown in unmanned plane express delivery |
Publications (1)
Publication Number | Publication Date |
---|---|
CN208909645U true CN208909645U (en) | 2019-05-31 |
Family
ID=66692114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201820681863.3U Active CN208909645U (en) | 2018-05-09 | 2018-05-09 | Rack is thrown in unmanned plane express delivery and object device is thrown in unmanned plane express delivery |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN208909645U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112796237A (en) * | 2019-11-14 | 2021-05-14 | 北京三快在线科技有限公司 | Unmanned aerial vehicle parking device and system |
CN112901005A (en) * | 2019-11-19 | 2021-06-04 | 北京三快在线科技有限公司 | Unmanned aerial vehicle goods receiving platform, system and control method thereof |
CN116923984A (en) * | 2023-07-27 | 2023-10-24 | 广东福临门世家智能家居有限公司 | Parcel receiving curtain wall system suitable for unmanned aerial vehicle delivery |
-
2018
- 2018-05-09 CN CN201820681863.3U patent/CN208909645U/en active Active
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112796237A (en) * | 2019-11-14 | 2021-05-14 | 北京三快在线科技有限公司 | Unmanned aerial vehicle parking device and system |
CN112901005A (en) * | 2019-11-19 | 2021-06-04 | 北京三快在线科技有限公司 | Unmanned aerial vehicle goods receiving platform, system and control method thereof |
CN112901005B (en) * | 2019-11-19 | 2022-07-12 | 北京三快在线科技有限公司 | Unmanned aerial vehicle goods receiving platform, system and control method thereof |
CN116923984A (en) * | 2023-07-27 | 2023-10-24 | 广东福临门世家智能家居有限公司 | Parcel receiving curtain wall system suitable for unmanned aerial vehicle delivery |
CN116923984B (en) * | 2023-07-27 | 2024-04-02 | 广东福临门世家智能家居有限公司 | Parcel receiving curtain wall system suitable for unmanned aerial vehicle delivery |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN208909645U (en) | Rack is thrown in unmanned plane express delivery and object device is thrown in unmanned plane express delivery | |
US11093888B1 (en) | On-demand designated delivery locator | |
EP3627269A1 (en) | Target tracking method and apparatus, mobile device and storage medium | |
US10577124B2 (en) | Method for destination approach control of unmanned aerial vehicles | |
AU2015243644B2 (en) | Method for delivering a shipment by an unmanned transport device | |
CN103778523B (en) | Vertical take-off and landing unmanned aerial vehicle and precise positioning and obstacle avoidance method thereof | |
CN107211111B (en) | System and method for automatic vehicle imaging | |
US20180082598A1 (en) | Automated package delivery to a delivery receptacle | |
KR20200018197A (en) | Moving robot and contorlling method and a terminal | |
CN105093237B (en) | A kind of unmanned plane obstacle detector and its detection method | |
WO2018021457A1 (en) | Moving body guidance system, moving body, guidance device, and computer program | |
CN110062919A (en) | Drop-off location planning for delivery vehicles | |
US20170369167A1 (en) | Precise and rapid delivery of an emergency medical kit from an unmanned aerial vehicle | |
CN105989459A (en) | Unmanned aerial vehicle automatic navigation goods receiving and delivering system and use method thereof | |
CN106662879A (en) | Object avoidance for automated aerial vehicles | |
US10875665B2 (en) | Aerial vehicle charging method and device | |
CN105492985A (en) | Multi-sensor environment map building | |
CN103477185A (en) | Measuring system for determining 3D coordinates of an object surface | |
CN105892492A (en) | Unmanned aerial vehicle communication control method and device | |
CN108388266A (en) | A kind of UAV system for logistics delivery | |
US11392130B1 (en) | Selecting delivery modes and delivery areas using autonomous ground vehicles | |
CN113820709B (en) | Through-wall radar detection system and detection method based on unmanned aerial vehicle | |
CN207249118U (en) | The laser scanning range-finding device of glasses for guiding blind | |
Scholz et al. | Concept for Sensor and Processing Equipment for Optical Navigation of VTOL during Approach and Landing | |
CN208207609U (en) | A kind of following device and unmanned transport vehicle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai Guangshi fusion Intelligent Technology Co.,Ltd. Assignor: BEIJING WHYHOW INFORMATION TECHNOLOGY Co.,Ltd. Contract record no.: X2022110000047 Denomination of utility model: UAV express delivery rack and UAV express delivery device Granted publication date: 20190531 License type: Common License Record date: 20221012 |
|
EE01 | Entry into force of recordation of patent licensing contract |