GB2172796A - Toothbrush with integral toothpaste supply - Google Patents

Toothbrush with integral toothpaste supply Download PDF

Info

Publication number
GB2172796A
GB2172796A GB08513146A GB8513146A GB2172796A GB 2172796 A GB2172796 A GB 2172796A GB 08513146 A GB08513146 A GB 08513146A GB 8513146 A GB8513146 A GB 8513146A GB 2172796 A GB2172796 A GB 2172796A
Authority
GB
United Kingdom
Prior art keywords
toothpaste
described
toothbrush
body
brush head
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.)
Withdrawn
Application number
GB08513146A
Other versions
GB8513146D0 (en
Inventor
Colin Stanley Jackson
Carolyne Susan Jackson
Original Assignee
Colin Stanley Jackson
Carolyne Susan Jackson
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to GB858507639A priority Critical patent/GB8507639D0/en
Application filed by Colin Stanley Jackson, Carolyne Susan Jackson filed Critical Colin Stanley Jackson
Publication of GB8513146D0 publication Critical patent/GB8513146D0/en
Publication of GB2172796A publication Critical patent/GB2172796A/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A46BRUSHWARE
    • A46BBRUSHES
    • A46B11/00Brushes with reservoir or other means for applying substances, e.g. paints, pastes, water
    • A46B11/001Brushes with reservoir or other means for applying substances, e.g. paints, pastes, water with integral reservoirs
    • A46B11/002Brushes with reservoir or other means for applying substances, e.g. paints, pastes, water with integral reservoirs pressurised at moment of use manually or by powered means
    • A46B11/0024Brushes with reservoir or other means for applying substances, e.g. paints, pastes, water with integral reservoirs pressurised at moment of use manually or by powered means with a permanently displaceable pressurising member that remain in position unless actuated, e.g. lead-screw or ratchet mechanisms, toothpaste tube twisting or rolling devices
    • AHUMAN NECESSITIES
    • A46BRUSHWARE
    • A46BBRUSHES
    • A46B2200/00Brushes characterized by their functions, uses or applications
    • A46B2200/10For human or animal care
    • A46B2200/1066Toothbrush for cleaning the teeth or dentures

Abstract

A toothbrush with integral toothpaste supply comprises a toothbrush with a hollow stem and a hole in the top of the brush head through which toothpaste is propelled into the bristles, attached to a hollow body, either factory-injected with toothpaste or containing a toothpaste- filled reservoir. Means for propelling the toothpaste out of the body, down the toothbrush stem, out of the hole in the brush head and into the bristles comprises a piston 11 driven by a central screw mechanism 12 activated by knob 10. In alternative embodiments the means for propelling toothpaste out of the body comprises an air pump located in the neck of the brush stem (Figs. 10-13). A cap is provided to cover the brush head, said cap having means 16 to seal the hole in the brush head and prevent the toothpaste drying out. <IMAGE>

Description

SPECIFICATION Toothbrush with integral toothpaste supply This invention relates to a toothbrush with integral supply of toothpaste.

Essentially, the invention consists of a conventional toothbrush head with a hollow stem and hole in the top of brush head; attached to a hollow body containing toothpaste. A mechanism propels the toothpaste out ofthe body, down the hollow stem and, via a hole in the brush head, into the bristles.

The device affords the user a quick, convenient method of teeth cleaning in circumstances where this would not normally be practicable.

A cap keeps the brush head clean andthe brush head can be sealed (by a plug or other means) to preventthe toothpaste drying out and blocking the head.

There are two alternative methods oftoothpaste supply: Toothpaste to be factory-injected directly into 'disposable' body, or Reservoirs to be inserted into body by the user.

When empty,furthertoothpaste supplies would be available in the form of replacement bodies, see figures 2, 11-1 3c, or reservoirs, see figures 4, 10--10d.

A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which: Figure 1 shows in cross-section the factoryinjected body in which piston 11 is driven by a central screw mechanism 12, activated by knob 10. Two ribs 13 on the inside ofthe body preventthe piston turning.

It is envisaged that the body of the tooth brush would be transparent, allowing the userto see how much toothpaste is left.

The screw 12 driving the piston 11 is geared so that one revolution of knob 10 deliversthe correct amount of toothpaste to the brush head. A 'clickstop' mechanism (not shown) indicates this to the user.

Figures2 and 3 show howthe invention would be supplied, i.e. one or more toothpaste-filled bodies sealed with cap 15, together with separate brush/cap/ plug.

Additionally: Figure 2 shows vent hole 14in bodywhich maybe required to facilitate the injection of tooth paste into the body. This would prevent air being trapped inside body, which may impede toothpaste. A quarterturn of knob 10 then seals the body for life.

Figure 3 shows plug 16. Once toothbrush has been used and there is toothpaste inside the stem and brush head 17, this plug prevents paste drying out if the device is to be stored without use for extended periods. See also Figures 14to 19 for alternatives.

Figure 4 shows alternative reservoir supply. This may be moulded in a ribbed configuration so that it collapses in a concertina-like fashion under pressure from piston. Cap 15 keeps it sealed until used. Refill is first screwed into neck of brush stem and then body attached, see Figures 5 and 6.

Figure5shows a method of driving the piston which is similarto that employed in lipstick cosmetics, i.e. piston 11 has two pins projecting through grooves in inner sleeve 19 into a screw thread 18 cut into outer sleeve 20.Turning knob 10 revolves inner sleeve 19 inside stationary outer sleeve 20 and drives piston 11 forwards down screw thread 18 in outer sleeve 20. Because piston 11 is rotating as it drives forward, it is equipped with a separate top plate connected to piston 11 by a ball and socket, see FigureS. This absorbs the rotation of piston 11 and prevents the reservoir from becoming distorted and fractured.

Figure 6shows cutaway view of piston 11 with top plate and ball and socket as described above. Also shown by the arrows is the path ofthe toothpaste out of the reservoirthrough to brush head.

Figure 7shows a third method of driving the piston,which is in theform of an air pump at the base ofthe body. This could be used with eitherthe factory-injected body toothpaste supply or alternative reservoir supply. If employed with the reservoir method, a relief valve 21 would enablethe piston to be returned to the base ofthe bodyto enable the insertion of a new reservoir. Valve 21 is illustrated in the open position.

Figure 8When plunger 22 is depressed, non-rnturn valve 23 closes and pressure of airtrapped inside body drives piston 11 forwards.

Figure9When plunger 22 is released, spring 24 returns plunger22to original position with nonreturn valve 23 open, allowing air to be drawn into body.

Figure 10 shows another version employing collapsible reservoir25,whereby brush head is opened, toothpaste propelled and brush head closed in one motion of applying hand pressure to end of brush head. Figures 1 0a to 1 Od show this in sequence.

Figure lOa Initial pressure compresses spring 26 in brush head and aligns holes in brush head and stem.

Figure 10b Continued pressure compresses spring 27 in pump. Brush stem travels over central rod 28, which acts as a plunger, forcing paste down stem, through to brush head. Pump breathes through vent 29.

Figure 10chows mechanism fully compressed.

Figure lOdHand pressure is removed from end of brush head, spring 26 in brush head seals brush heac and spring 27 in pump forces stem outwards, drawing toothpaste, bvvacuum into stem. Reservoir 25 collapses progressively as it empties. Mechanism returnsto position shown in Figure 10. Brush head is retained on stem by means of a peg on stem running in a parallel groove in brush head, orviceversa (not shown).

Figure 11 shows a variation on Figures 10 to 1 Od above wherein piston 11 is drawn up body by vacuum to compact paste against pump.

Figure 12 shows another method of opening brush head, propelling toothpaste and closing brush head in one action similarto thatshown in Figures 10to 11 (sheet 3). Diagrams 12ato 12cshowthis in sequence Figure 12a Initial pressure compresses spring 26 ir brush head and aligns holes in brush head and stem.

Figure 12b Continued pressure compresses spring 27 in air pump. Air pressure propels piston 11 down body, driving paste through hole in central channel 30, down stem to brush head. Pump draws air through vents 29.

Figure 12c Shows mechanism fully compressed and piston 11 at the end of its travel. Hand pressure to end of brush head is then removed allowing springs 26 and 27 to return mechanism to original position shown in Figure 12. However piston 11 remains in its forward position as air is drawn past pump seal 31 (or alternatively through non-return valve) via vents 29. Brush head is retained on stem by means of a peg on stem running in a parallel groove in brush head, or vice versa (not shown).

Figure 13 shows a further method of opening brush head, propelling paste and closing brush head in one action similar two that shown in Figures 10 to 12c. Figures 13a to 13c show this in sequence.

Figure 13a Initial pressure compresses spring 26 in brush head and aligns holes in brush head and stem.

Figure 13b Continued pressure compresses spring 27 in air pump. Air is pumped down one or more channels 32 in side of body to chamber 33 at back of piston 11, thereby driving piston 11 forwards. Pump draws air through vents 29.

Figure 13c shows mechanism fully compressed and piston 11 at the end of its travel. Hand pressure to end of brush head is then removed, allowing springs 26 and 27 to return mechanism to original position shown in Figure 13. However piston 11 remains in its forward position as air is drawn past pump seal (or alternatively through a non-return valve) via vents 29. Brush head is retained on stem by means of a peg on stem running in a parallel groove in brush head, or vice versa (not shown).

Figures 14 to 19 show alternative methods of sealing brush head.

Figure 14 End of brush clips into cap so that when cap is pulled off, brush head is pulled past retaining dimples 34 on brush stem to align holes in stem and head. Once toothpaste has been supplied, the user pushes the head back, thereby sealing head. If user fails to do this, the head will be pressed back by the cap when it is replaced. Brush head is retained on stem by means of a peg running in a parallel groove in brush head, or vice versa (not shown).

Figure 15 operates in the same way as Figure 14 above. However, lip 35 on brush step necessitates the use of a square hole in brush head.

Figure 16 employs the use of a 'twist-and-pull-off" cap held by a parallel rib. A half turin releases the cap allowing itto be pulled off. The end of the brush head slots into a moulding inside the top of the cap, in a spanner-like fashion. As the cap is twisted the brush head rotates over retaining dimples 34 to align holes in brush head and stem, the cap is removed and the brush used. When the cap is replaced the brush head rotates back to seal head.

Note that the use of the cap in Figures 13, 14 and 15 may be discounted. A cap as shown in Figure 1 may be used and the sealing mechanisms operated manually.

Figure 17 Here the central section of the brush slides backwards and forwards to open and close the brush head. The thumb is used to slide the section back towards the body to expose the hole, paste is propelled through the hole and the section slid back to seal the hole prior to brushing the teeth.

When the sliding section is in the closed position the brush head resembles a conventional toothbrush as there is a complete set of bristles.

Figure 18 is an adaptation of Figure 17 wherein pressure from a spring 36 is used to close brush head automatically. This would lend itself for use with toothpaste propellent methods described in Figures 10 to 1 3c as it uses the same backwards movement.

Figure 19 This method of sealing brush head is particularly suited to toothpaste propellent methods shown in Figures 1/2 and 5/6. Spring-loaded plunger is forced back by pressure of toothpaste allowing passage of paste through hole to brush head. Knob 10 (see Figures 1/2, 5/6) is then turned back 41-tu rn releasing spring-loaded plunger to re-seal head.

Claims (10)

1. A toothbrush with integral toothpaste supply comprising: Toothbrush head with hollow stem and hole in top of brush head through which toothpaste is propelled into bristles.
A hollow body to contain toothpaste supply in one of two forms; (a) Tooth paste factory-injected directly into disposable bodies, or (b) Replaceable reservoir where the body is retained indefinitely.
A mechanism to propel the toothpaste out of the body, down the brush stem, out of the hole in the brush head and into the bristles.
A cap to protect the brush head and a mechanism to seal the brush head and prevent toothpaste drying out.
2. A toothbrush with integral toothpaste supply as described in Claim 1, wherein the toothpaste is propelled by a piston driven by a central screw mechanism in the body as described in Figures 1,2 and 3.
3. Atoothbrush with integral toothpaste supply as described in Claim 1, wherein the toothpaste is contained in a replaceable reservoir which collapses under pressure from a piston driven by a 'lipsticktype' mechanism in the body as described in Figures 4,5 and 6.
4. A toothbrush with integral toothpaste supply as described in Claims 1 and 3, wherein the toothpaste is propelled by a piston driven by an air pump at the base of the body, as described in Figures 7,8 and 9.
5. Atoothbrush with integral toothpaste supply as described in Claim 1, wherein the toothpaste is contained in a replaceable reservoir, which collapses as toothpaste is pumped from it by a pump in neck of brush stem as described in Figures lotto 10d.
6. A toothbrush with integral toothpaste supply as described in Claims 1 and 5, wherein a piston is drawn up the body to compact toothpaste against pump as described in Figure 11.
7. A toothbrush with integral toothpaste supply as described in Claim 1, wherein toothpaste is propelled by a piston driven down body by air pump in neck of brush stem, driving toothpaste through hole in central channel as described in Figures 12 to 12c.
8. A toothbrush with integral toothpaste supply as described in Claims 1 and 7, wherein toothpaste is propelled up body by air pump as described in Figures 13 to 13c.
9. A toothbrush with integral toothpaste supply as described in Claims 1-8 wherein the brush head is sealed by one of six alternative sealing mechanisms described in Figures 14--19.
10. A toothbrush with integral toothpaste supply substantially as described in Claims 1-4 and 6--8 wherein the toothbrush body is transparent, showing the position of the piston within the body and the amount of toothpaste therein.
GB08513146A 1985-03-25 1985-05-24 Toothbrush with integral toothpaste supply Withdrawn GB2172796A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB858507639A GB8507639D0 (en) 1985-03-25 1985-03-25 Toothbrush

Publications (2)

Publication Number Publication Date
GB8513146D0 GB8513146D0 (en) 1985-06-26
GB2172796A true GB2172796A (en) 1986-10-01

Family

ID=10576560

Family Applications (2)

Application Number Title Priority Date Filing Date
GB858507639A Pending GB8507639D0 (en) 1985-03-25 1985-03-25 Toothbrush
GB08513146A Withdrawn GB2172796A (en) 1985-03-25 1985-05-24 Toothbrush with integral toothpaste supply

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB858507639A Pending GB8507639D0 (en) 1985-03-25 1985-03-25 Toothbrush

Country Status (1)

Country Link
GB (2) GB8507639D0 (en)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203636A (en) * 1987-04-22 1988-10-26 George Walter Jelinek Portable dental hygiene device
GB2205486A (en) * 1987-04-09 1988-12-14 David Mead Toothbrush having toothpaste supply
WO1991013569A1 (en) * 1990-03-09 1991-09-19 Michael Hertrampf Dispenser for liquid or paste materials
DE4206131A1 (en) * 1992-02-28 1993-09-02 Guenter Hofmann Toothbrush with bristled brush part and long handle as toothpaste storage container - has duct leading from container to bristles, and piston, drive wheel, spindle for ejecting toothpaste.
GB2286333A (en) * 1994-02-09 1995-08-16 Philip John Schatzberger Reservoir toothbrush
GB2290702A (en) * 1994-06-22 1996-01-10 Ian Wooldridge Reservoir toothbrush
WO1996010351A1 (en) * 1994-10-03 1996-04-11 Domingo Obradors Giro Tooth brush with incorporated tooth paste reservoir
GB2300803A (en) * 1995-05-17 1996-11-20 Jonathan Richard Barry Toothbrush
GB2301277A (en) * 1995-04-18 1996-12-04 Frank Stewart Burgess Reservoir toothbrush
WO1997006712A1 (en) * 1995-08-12 1997-02-27 Hcare Limited A toothbrush
GB2284982B (en) * 1993-12-24 1998-05-27 Brian Milligan Toothbrush with a pressurised reservoir in the handle
GB2322071A (en) * 1997-02-17 1998-08-19 Andrew Peter Collins Reservoir toothbrush
GB2329110A (en) * 1996-07-15 1999-03-17 Peter Rickett Reservoir toothbrush
GB2339384A (en) * 1998-07-10 2000-01-26 Philip Potter Reservoir toothbrush
GB2346547A (en) * 1999-02-12 2000-08-16 Sebastian Fernandez Reservoir toothbrush
GB2386828A (en) * 2002-02-27 2003-10-01 Barry William Percival A toothbrush with a built-in toothpaste holder.
GB2390014A (en) * 2002-06-28 2003-12-31 Patricia Webster Toothbrush with cleaning agent dispensed at the bristle head
GB2403136A (en) * 2003-06-27 2004-12-29 Lydia Charmaine Psaros Reservoir toothbrush
ES2253976A1 (en) * 2003-04-21 2006-06-01 Alberto Bostal Toothbrush with toothpaste container and dosing trigger for use outside of home, has trigger deactivated to generate depressurization in superior chamber and tubular canal to close secondary valve and open primary valve
WO2008056018A1 (en) * 2006-11-10 2008-05-15 Sierra Flores Ramon Toothpaste tube with built-in brush
DE102011017423A1 (en) * 2011-04-18 2012-12-20 Wilhelm Giehl Multipurpose compact toothbrush used during traveling, has replaceable toothpaste bag with outlet opening from which toothpaste is supplied by pressing container to bristles of interchangeable brush head via metering system
US8479340B2 (en) 2007-01-19 2013-07-09 Colgate-Palmolive Company Toothbrush with powered head
DE102014004230A1 (en) * 2014-03-25 2015-10-01 Adnan Demirkiran Dental care unit
CN107087890A (en) * 2017-06-20 2017-08-25 四川蓉资旅游科技股份有限公司 A kind of improved oral care device
CN107136745A (en) * 2017-06-20 2017-09-08 四川蓉资旅游科技股份有限公司 Portable tooth brushing device based on mechanics principle

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB913371A (en) * 1900-01-01
GB352823A (en) * 1930-09-25 1931-07-16 Thomas Christian Improvements in and relating to tooth brushes
GB443561A (en) * 1934-09-05 1936-03-05 Harry Brown Improvements in or relating to reservoir brushes
GB576713A (en) * 1945-01-23 1946-04-16 Alan Brandreth Improved dispensing device for liquid and paste materials
GB635724A (en) * 1944-03-08 1950-04-12 Giancarlo Antolini Reservoir tooth-brush
GB1020689A (en) * 1963-10-11 1966-02-23 Louis William Sanderson Improvements in or relating to tooth brushes
GB1028984A (en) * 1963-11-13 1966-05-11 Rene Saubal Bayard Toothbrush with pneumatic feed of dentifrice to the bristles
GB1261850A (en) * 1969-09-05 1972-01-26 Ulisse Bencivelli Improvements in or relating to toothbrushes
GB1594105A (en) * 1977-11-04 1981-07-30 Coxson S R Tooth brush
GB2143428A (en) * 1983-05-30 1985-02-13 Gaspar Inacio Cruz Pulido Toothbrush
WO1985000731A1 (en) * 1983-08-08 1985-02-28 Glenn Robert Beale Brush assembly

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB913371A (en) * 1900-01-01
GB352823A (en) * 1930-09-25 1931-07-16 Thomas Christian Improvements in and relating to tooth brushes
GB443561A (en) * 1934-09-05 1936-03-05 Harry Brown Improvements in or relating to reservoir brushes
GB635724A (en) * 1944-03-08 1950-04-12 Giancarlo Antolini Reservoir tooth-brush
GB576713A (en) * 1945-01-23 1946-04-16 Alan Brandreth Improved dispensing device for liquid and paste materials
GB1020689A (en) * 1963-10-11 1966-02-23 Louis William Sanderson Improvements in or relating to tooth brushes
GB1028984A (en) * 1963-11-13 1966-05-11 Rene Saubal Bayard Toothbrush with pneumatic feed of dentifrice to the bristles
GB1261850A (en) * 1969-09-05 1972-01-26 Ulisse Bencivelli Improvements in or relating to toothbrushes
GB1594105A (en) * 1977-11-04 1981-07-30 Coxson S R Tooth brush
GB2143428A (en) * 1983-05-30 1985-02-13 Gaspar Inacio Cruz Pulido Toothbrush
WO1985000731A1 (en) * 1983-08-08 1985-02-28 Glenn Robert Beale Brush assembly

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2205486A (en) * 1987-04-09 1988-12-14 David Mead Toothbrush having toothpaste supply
GB2203636A (en) * 1987-04-22 1988-10-26 George Walter Jelinek Portable dental hygiene device
WO1991013569A1 (en) * 1990-03-09 1991-09-19 Michael Hertrampf Dispenser for liquid or paste materials
DE4206131A1 (en) * 1992-02-28 1993-09-02 Guenter Hofmann Toothbrush with bristled brush part and long handle as toothpaste storage container - has duct leading from container to bristles, and piston, drive wheel, spindle for ejecting toothpaste.
GB2284982B (en) * 1993-12-24 1998-05-27 Brian Milligan Toothbrush with a pressurised reservoir in the handle
GB2286333A (en) * 1994-02-09 1995-08-16 Philip John Schatzberger Reservoir toothbrush
GB2290702A (en) * 1994-06-22 1996-01-10 Ian Wooldridge Reservoir toothbrush
WO1996010351A1 (en) * 1994-10-03 1996-04-11 Domingo Obradors Giro Tooth brush with incorporated tooth paste reservoir
GB2301277A (en) * 1995-04-18 1996-12-04 Frank Stewart Burgess Reservoir toothbrush
GB2300803A (en) * 1995-05-17 1996-11-20 Jonathan Richard Barry Toothbrush
GB2304033A (en) * 1995-08-12 1997-03-12 Dean Russell Lees Toothbrush
WO1997006712A1 (en) * 1995-08-12 1997-02-27 Hcare Limited A toothbrush
GB2329110A (en) * 1996-07-15 1999-03-17 Peter Rickett Reservoir toothbrush
GB2322071A (en) * 1997-02-17 1998-08-19 Andrew Peter Collins Reservoir toothbrush
GB2339384A (en) * 1998-07-10 2000-01-26 Philip Potter Reservoir toothbrush
GB2346547A (en) * 1999-02-12 2000-08-16 Sebastian Fernandez Reservoir toothbrush
GB2386828A (en) * 2002-02-27 2003-10-01 Barry William Percival A toothbrush with a built-in toothpaste holder.
GB2390014A (en) * 2002-06-28 2003-12-31 Patricia Webster Toothbrush with cleaning agent dispensed at the bristle head
ES2253976A1 (en) * 2003-04-21 2006-06-01 Alberto Bostal Toothbrush with toothpaste container and dosing trigger for use outside of home, has trigger deactivated to generate depressurization in superior chamber and tubular canal to close secondary valve and open primary valve
GB2403136A (en) * 2003-06-27 2004-12-29 Lydia Charmaine Psaros Reservoir toothbrush
WO2008056018A1 (en) * 2006-11-10 2008-05-15 Sierra Flores Ramon Toothpaste tube with built-in brush
RU2489954C1 (en) * 2007-01-19 2013-08-20 Колгейт-Палмолив Компани Toothbrush with drive head
US9027188B2 (en) 2007-01-19 2015-05-12 Colgate-Palmolive Company Toothbrush with powered head
US8479340B2 (en) 2007-01-19 2013-07-09 Colgate-Palmolive Company Toothbrush with powered head
DE102011017423A1 (en) * 2011-04-18 2012-12-20 Wilhelm Giehl Multipurpose compact toothbrush used during traveling, has replaceable toothpaste bag with outlet opening from which toothpaste is supplied by pressing container to bristles of interchangeable brush head via metering system
DE102011017423B4 (en) * 2011-04-18 2016-02-25 Wilhelm Giehl Compact toothbrush on the go with integrated toothbrush, toothpaste with dosing system and protective cap
DE102014004230A1 (en) * 2014-03-25 2015-10-01 Adnan Demirkiran Dental care unit
CN107087890A (en) * 2017-06-20 2017-08-25 四川蓉资旅游科技股份有限公司 A kind of improved oral care device
CN107136745A (en) * 2017-06-20 2017-09-08 四川蓉资旅游科技股份有限公司 Portable tooth brushing device based on mechanics principle

Also Published As

Publication number Publication date
GB8513146D0 (en) 1985-06-26
GB8507639D0 (en) 1985-05-01

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