US3302230A - Toothbrush - Google Patents

Toothbrush Download PDF

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Publication number
US3302230A
US3302230A US498504A US49850465A US3302230A US 3302230 A US3302230 A US 3302230A US 498504 A US498504 A US 498504A US 49850465 A US49850465 A US 49850465A US 3302230 A US3302230 A US 3302230A
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US
United States
Prior art keywords
bristles
toothbrush
cross
section
dentifrice
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.)
Expired - Lifetime
Application number
US498504A
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English (en)
Inventor
Poppelmann Ake
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Individual
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Individual
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Publication of US3302230A publication Critical patent/US3302230A/en
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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B1/00—Brush bodies and bristles moulded as a unit
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0238—Bristles with non-round cross-section

Definitions

  • the present invention relates to a toothbrush made f a thermoplastic material, such as polyethylene or polypropylene and comprising a handle and bristles produced in one unit.
  • Toothbrushes of polyethylene are also .kno-wn, but the bristles of these must be made coarser than the bristles of conventional toothbrushes, 'because of technical reasons.
  • toothbrush according to this invention which because of its economical cost is, in addition, Very suitable for disposable use e.g. in medical and dental services or at restaurants or hotels and when travelling.
  • the characterising features of the toothbrush according to the invention is that its bristles taper or narrow toward the apices, preferably from the base to the apex, and have a cross-section in the shape of a polygon with at least two acute angles, and that the bristles have a coating of dentifrice.
  • the cross-section of the bristles can be, therefore, triangular, rhomb-ic, star shaped or form an irregular polygon, due to this shape of bristle a scraping effect is obtained, which is never achieved by a bristle of for instance circular cross-section, from which only a brushing effect is obtained.
  • the toothbrush according to the invention is espe-cially suitable for massage of the gums. It has proved especially suitable to use a thermoplastic material having a Shore ICC C hardness of to 94, preferably 85 to 87, determined according to DIN 53505.
  • the bristles can, to great advantage, on a toothbrush according to this inventi-om be produced of a thermoplastic material that is relatively soft, such as polyethylene of a density to within the range 0.917 to 0.940, especially 0930-0935, where the density is expressed in g./cm.3 and defined according to DIN 5 3749.
  • the melting index of the polyethylene shall according to the invention, preferably lie within the range 1.5 to 1.7, especially 3.0 to 5 eg. approximately 4, where the melting temperature range is expressed in g./l0 min. and delined according to ASTM D 1238-57T.
  • the bristles can be given a relatively large cross-secti-onal area, which, however, as before mentioned, should decrease towards the apices, -by which the bristles obtain the required mechanical qualities such as stiffness and ileximility.
  • FIG. 1 shows a sectional elevation of a suitable embodiment of a toothbrush, which has been produced by injection moulding
  • FIG. 2 shows the bristles in a plan elevation
  • FIG. 3 shows the bristles in an end elevation along the lines 3 3 of FIG. 1
  • FIGS. 4, 5 and 6 show, on a larger scale, a cross-section of a bristle.
  • the toothbrush is provided lwith a handle 1, which has longitudinal and transverse strengthening ribs 2.
  • the head of the toothbrush is indicated by 3 and its bristles by 4.
  • the bristles 4 have a trianglar cross-section as is apparent from FIG. 2 and on a larger scale in FIG. 4.
  • the bristles have such a cross-section as is .shown in FIGS. 5 and 6.
  • the cross-section is rhombic and in FIG. 6 star shaped.
  • the toothbrush is provided with a coating of tooth dentifrice, e.g. in the form of a layer on the bristles or in some other way by which the supply of special toothpaste becomes abundant when brushing the teeth.
  • the dentifrice can be comprised of a paste which slowly dissolves on contact with moisture, and preferably be situated between the separate bristles and most preferably in proximity to their union with the handle.
  • This paste contains active detergents of the usual, existing types, e.g. sodium lauryl sulphate or sodium dodecyl benzene sulphonate, taste and smell substances and possibly other additive mediums usual to dental care preparations, such as mild grinding media or polishing media, tooth enamel strengthening additives and substances containing uorides, etc., and as binding agent, a gelating substance that is slowly dissolved by moisture, such as vegetable gums, alginates or cellulose derivatives, e.g. carboxymethylcellulose.
  • a disposable toothbrush can be used several times, e.g. 3 to 10 times, without additional dentifrice being necessary. On renewed use a new quantity of dentifrice is dissolved by the moisture supplied.
  • the dentifrice may be coloured in order to make it easier to observe when it has been consumed.
  • the coating of dentifrice is preferably provided with bactericides or fungicides of conventional type.
  • saliva secreting agents eg. in the form of an acid or an acidic salt, preferably vitamin C
  • the addition of water, when brushing the teeth becomes unnecessary.
  • the sodium saccharine and the saliva secreting agents can each be included in a quantity of about 20 percent by Weight, the active detergent can be added in a quantity of about percent by weight, and the distilled water is added up to 100 percent by weight.
  • a toothbrush of thermoplastic material comprising a back having bristles in which the bristles taper toward the apices and have a cross section in the shape of a polygon with at least two acute angles and in which the bristles are provided with a coating of a dentifrice, each of said bristles tapering from the base to the apex, and the cross section at the base is approximately 0.2 mm2, each said bristle having a Shore C hardness of 85 to 87 and a density of 0.930-0935 where density is expressed in g./cm.3, and having a dentifrice containing a slowly dissolving gelatinous substance which dissolves upon contact with water, said dentifrice further containing a saliva secreting agent.

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  • Brushes (AREA)
  • Cosmetics (AREA)
US498504A 1964-10-30 1965-10-20 Toothbrush Expired - Lifetime US3302230A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE13124/64A SE310646B (enrdf_load_stackoverflow) 1964-10-30 1964-10-30

Publications (1)

Publication Number Publication Date
US3302230A true US3302230A (en) 1967-02-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US498504A Expired - Lifetime US3302230A (en) 1964-10-30 1965-10-20 Toothbrush

Country Status (10)

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US (1) US3302230A (enrdf_load_stackoverflow)
AT (1) AT283581B (enrdf_load_stackoverflow)
BE (1) BE671636A (enrdf_load_stackoverflow)
CH (1) CH445444A (enrdf_load_stackoverflow)
DE (1) DE1532799B2 (enrdf_load_stackoverflow)
FI (1) FI42821B (enrdf_load_stackoverflow)
GB (1) GB1083369A (enrdf_load_stackoverflow)
NL (1) NL6514044A (enrdf_load_stackoverflow)
NO (1) NO117072B (enrdf_load_stackoverflow)
SE (1) SE310646B (enrdf_load_stackoverflow)

Cited By (66)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378870A (en) * 1967-03-22 1968-04-23 Matsunaga Kenji Toothbrush
US3589823A (en) * 1969-09-02 1971-06-29 Orrin W Hendrickson Disposable toothbrush
USD248696S (en) 1976-09-02 1978-08-01 Sylvan Greenberg Tooth brush
US4565205A (en) * 1983-03-18 1986-01-21 Super Brush Co., Inc. Molded mascara applicator
USD333216S (en) 1991-06-18 1993-02-16 The Procter & Gamble Company Toothbrush handle
USD340584S (en) 1992-01-10 1993-10-26 The Procter & Gamble Company Brush handle
WO1994009677A1 (en) * 1992-11-02 1994-05-11 Gillette Canada Inc. Toothbrush
US5339482A (en) * 1992-07-21 1994-08-23 Johnson & Johnson Consumer Products, Inc. Toothbrush having non-slip surface
WO1995013412A1 (en) * 1993-11-10 1995-05-18 Gmz Holding Company Disposable toothbrush having mint flavored toothpaste composition bonded to bristles thereof
WO1995017116A1 (en) * 1993-12-22 1995-06-29 Benlidi Holdings Pty. Ltd. Toothbrushes, particularly for one-time use
US5522174A (en) * 1994-11-21 1996-06-04 Wagner; Vida A. Sanitary bug catcher
US5605756A (en) * 1993-09-14 1997-02-25 Gmz Holding Company Disposable toothbrush having mint flavored toothpaste composition bonded to bristles thereof
USD386005S (en) * 1996-04-04 1997-11-11 Colgate-Palmolive Company Toothbrush
USD386312S (en) * 1996-04-04 1997-11-18 Colgate-Palmolive Company Toothbrush
USD386906S (en) * 1996-04-04 1997-12-02 Colgate-Palmolive Company Toothbrush
WO1998004167A1 (en) * 1996-07-25 1998-02-05 Whitehill Oral Technologies, Inc. Toothbrush with improved cleaning and abrasion efficiency
US5806127A (en) * 1992-08-03 1998-09-15 Colgate-Palmolive Company Coded toothbrush
USD398154S (en) 1996-12-23 1998-09-15 Colgate-Palmolive Company Toothbrush
WO1998057569A1 (en) 1997-06-16 1998-12-23 Unilever N.V. Unitarily molded toothbrush
WO1998057570A1 (en) 1997-06-16 1998-12-23 Unilever N.V. Unitarily molded toothbrush
US5987688A (en) * 1995-11-09 1999-11-23 Gillette Canada Inc. Gum-massaging oral brush
US6138315A (en) * 1998-01-13 2000-10-31 Chesebrough-Pond's Usa Co., Divison Of Conopco, Inc. Antimicrobial active compounds
US6295733B1 (en) 1994-08-03 2001-10-02 Warner-Lambert Company Changeable color shaving aid
US20030115707A1 (en) * 1996-05-29 2003-06-26 Buford Edward T. Grooved brush bristle
US20030167582A1 (en) * 2002-03-07 2003-09-11 Ultradent Products, Inc. Powered tongue cleaning device
US20050000043A1 (en) * 2003-04-23 2005-01-06 The Procter & Gamble Company Electric toothbrushes
US20050060822A1 (en) * 2003-09-19 2005-03-24 Chenvainu Alexander T. Toothbrushes
US20050172435A1 (en) * 2002-04-24 2005-08-11 Michele Bernini Tooth-cleaning device
US20060080799A1 (en) * 2004-10-18 2006-04-20 Frank Lucente Toothbrush featuring bristles with raised annular portions
US20060242778A1 (en) * 1999-06-14 2006-11-02 Solanki Sanjay A Toothbrush
US20070251040A1 (en) * 2003-03-14 2007-11-01 The Procter & Gamble Company Toothbrush head
US20070289078A1 (en) * 2006-06-16 2007-12-20 Georges Driesen Toothbrush, toothbrush head and tooth cleaning bristle
USD566400S1 (en) * 2007-06-21 2008-04-15 Inhomevations Combined banana-shaped toothbrush and teether for infants
WO2007092823A3 (en) * 2006-02-07 2008-07-10 Whitehill Oral Tech Inc Sialagogue coatings for interproximal devices
US20080163500A1 (en) * 2005-02-03 2008-07-10 Bic-Violex Sa Razor Handle Having Ergonomic Gripping Areas
US20080181716A1 (en) * 2007-01-25 2008-07-31 Gatzemeyer John J Oral Care Implement Housing an Oral Care Agent
US20090044357A1 (en) * 2007-08-16 2009-02-19 The Procter & Gamble Company Electric toothbrushes
US20090282628A1 (en) * 2003-02-11 2009-11-19 The Gillette Company Toothbrushes
US20100055233A1 (en) * 2008-08-29 2010-03-04 A. Schulman, Inc Optimized Flavored Polymeric Compositions
US20100162499A1 (en) * 2004-04-23 2010-07-01 Braun Phillip M Vibrating Toothbrush
USD619370S1 (en) 2008-04-09 2010-07-13 Live-Right, Llc Combined toothbrush and teether
US20100306944A1 (en) * 2009-03-04 2010-12-09 Braun Gmbh Toothbrush bristle and method for manufacturing such a bristle
US20110030160A1 (en) * 2009-08-06 2011-02-10 Mcneil-Ppc, Inc. Bristle configuration
US20110061189A1 (en) * 2009-09-15 2011-03-17 Mark Stephen Meadows Oral care products and methods of using and making the same
US20110230587A1 (en) * 2008-08-29 2011-09-22 A. Schulman, Inc. Flavored polymeric articles
US8042217B2 (en) 2004-11-02 2011-10-25 Colgate-Palmolive Company Toothbrush and method of making the same
WO2012015422A1 (en) * 2010-07-30 2012-02-02 Mycone Dental Supply Company, Inc. Toothbrush with reactive composition for remineralization of teeth
USD656734S1 (en) * 2010-05-27 2012-04-03 Don Allen Carpenter One-piece toothbrush
USD660598S1 (en) 2009-08-06 2012-05-29 Mcneil-Ppc, Inc. Toothbrush bristle
US20120324664A1 (en) * 2011-06-24 2012-12-27 Don Allen Carpenter Flexible toothbrush with rigid handle support
USRE44819E1 (en) 2000-03-16 2014-04-01 Procter & Gamble Business Services Canada Company Toothbrush
US9107491B2 (en) 2009-07-31 2015-08-18 Colgate-Palmolive Company High cleaning dentifrice compositions
US20150273517A1 (en) * 2012-12-14 2015-10-01 Henkel Ag & Co. Kgaa Application tool
USD745283S1 (en) 2014-12-12 2015-12-15 Live-Right, Llc Combined baby toothbrush and teether
US9750334B2 (en) 2011-01-04 2017-09-05 Trisa Holding Ag Toothbrush with injection-moulded bristles and method and apparatus for producing the same
EP2663209B1 (en) * 2011-01-12 2018-03-21 Colgate-Palmolive Company Oral care implement
US10251470B1 (en) 2017-10-10 2019-04-09 The Procter & Gamble Company Head for an oral care implement and oral care implement
US10299577B2 (en) 2012-07-02 2019-05-28 Trisa Holding Ag Method for producing brushes, in particular interdental brushes, and brush, in particular interdental brush, and product group comprising a plurality of brushes
US10306975B2 (en) 2017-06-01 2019-06-04 Colgate-Palmolive Company Oral care implement
US10856646B2 (en) 2014-07-15 2020-12-08 The Procter & Gamble Company Oral-care implement having color-communicative element
US20210204683A1 (en) * 2017-09-28 2021-07-08 The Procter & Gamble Company Method of making a unitary brush head and unitary toothbrush head
US11206916B2 (en) 2016-06-03 2021-12-28 The Procter & Gamble Company Head for an oral care implement and oral care implement
US11219302B2 (en) 2017-10-10 2022-01-11 The Procter & Gamble Company Head for an oral care implement and oral care implement
US11284707B2 (en) 2016-06-03 2022-03-29 The Procter & Gamble Company Filament for an oral care implement and oral care implement
US11877645B2 (en) 2021-05-14 2024-01-23 Colgate-Palmolive Company Personal care implement
USD1029506S1 (en) 2021-12-30 2024-06-04 Colgate-Palmolive Company Toothbrush

Families Citing this family (9)

* Cited by examiner, † Cited by third party
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DE3240637A1 (de) * 1982-11-04 1984-05-10 Makowsky, Herbert, Dr.med., 2800 Bremen Zahnbuerste
GB2184003A (en) * 1985-10-24 1987-06-17 Forsheda Ab A brush, especially a tooth brush
DE3743140A1 (de) * 1987-12-18 1989-06-29 Pai Tien Fa Zahnbuerste mit weichen borsten
US5272784A (en) * 1991-08-12 1993-12-28 Levin Samuel N Toothbrush handle
GB2266048A (en) * 1992-04-08 1993-10-20 Yancey Huang A brush
US5398367A (en) * 1993-12-27 1995-03-21 Lu; Guixian Toothbrush with both soft and hard bristles
EP0663162A1 (en) * 1994-01-17 1995-07-19 The Procter & Gamble Company Toothbrush with non-circular cross section filaments
GB2297489B (en) * 1995-02-04 1998-10-07 Michael William Hindmarch A tooth-cleaner
DE19706296A1 (de) * 1996-10-31 1998-05-07 Petr Zivny Zahnbürste

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CH203802A (de) * 1938-02-24 1939-03-31 Staerkle Moser Carl Gerät zum Polieren der Zähne.
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Cited By (113)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378870A (en) * 1967-03-22 1968-04-23 Matsunaga Kenji Toothbrush
US3589823A (en) * 1969-09-02 1971-06-29 Orrin W Hendrickson Disposable toothbrush
USD248696S (en) 1976-09-02 1978-08-01 Sylvan Greenberg Tooth brush
US4565205A (en) * 1983-03-18 1986-01-21 Super Brush Co., Inc. Molded mascara applicator
USD333216S (en) 1991-06-18 1993-02-16 The Procter & Gamble Company Toothbrush handle
USD340584S (en) 1992-01-10 1993-10-26 The Procter & Gamble Company Brush handle
US5339482A (en) * 1992-07-21 1994-08-23 Johnson & Johnson Consumer Products, Inc. Toothbrush having non-slip surface
US6033733A (en) * 1992-08-03 2000-03-07 Colgate-Palmolive Company Method for controlling dentifrice usage
US5806127A (en) * 1992-08-03 1998-09-15 Colgate-Palmolive Company Coded toothbrush
WO1994009677A1 (en) * 1992-11-02 1994-05-11 Gillette Canada Inc. Toothbrush
US5783249A (en) * 1993-09-14 1998-07-21 Gmz Holding Company Disposable toothbrush having mint flavored toothpaste composition bonded to bristles thereof
US5888578A (en) * 1993-09-14 1999-03-30 Gmz Holding Company Disposable toothbrush having mint flavored toothpaste composition bonded to bristles thereof
US5605756A (en) * 1993-09-14 1997-02-25 Gmz Holding Company Disposable toothbrush having mint flavored toothpaste composition bonded to bristles thereof
WO1995013412A1 (en) * 1993-11-10 1995-05-18 Gmz Holding Company Disposable toothbrush having mint flavored toothpaste composition bonded to bristles thereof
WO1995017116A1 (en) * 1993-12-22 1995-06-29 Benlidi Holdings Pty. Ltd. Toothbrushes, particularly for one-time use
US6295733B1 (en) 1994-08-03 2001-10-02 Warner-Lambert Company Changeable color shaving aid
US5522174A (en) * 1994-11-21 1996-06-04 Wagner; Vida A. Sanitary bug catcher
US8156600B2 (en) 1995-11-09 2012-04-17 The Gillette Company Gum massaging oral brush
US20070234496A1 (en) * 1995-11-09 2007-10-11 Gillette Canada Inc., A Canadian Corporation Gum massaging oral brush
US20060085931A1 (en) * 1995-11-09 2006-04-27 The Gillette Company, A Delaware Corporation Gum-massaging oral brush
US20090013484A1 (en) * 1995-11-09 2009-01-15 Michael Roberts Gum Massaging Oral Brush
US6151745A (en) * 1995-11-09 2000-11-28 Gillette Canada, Inc. Gum-massaging oral brush
US5987688A (en) * 1995-11-09 1999-11-23 Gillette Canada Inc. Gum-massaging oral brush
US20040087882A1 (en) * 1995-11-09 2004-05-06 Gillette Canada Company, A Canadian Corporation Gum massaging oral brush
US20050086753A1 (en) * 1995-11-09 2005-04-28 Gillette Canada, A Canadian Corporation Gum massaging oral brush
USD386005S (en) * 1996-04-04 1997-11-11 Colgate-Palmolive Company Toothbrush
USD386906S (en) * 1996-04-04 1997-12-02 Colgate-Palmolive Company Toothbrush
USD386312S (en) * 1996-04-04 1997-11-18 Colgate-Palmolive Company Toothbrush
US20030115707A1 (en) * 1996-05-29 2003-06-26 Buford Edward T. Grooved brush bristle
EP0955836A4 (enrdf_load_stackoverflow) * 1996-07-25 1999-11-17
US6138314A (en) * 1996-07-25 2000-10-31 Whitehill Oral Technologies, Inc. Toothbrush with improved cleaning and abrasion efficiency
US6086373A (en) * 1996-07-25 2000-07-11 Schiff; Thomas Method of cleaning teeth with a toothbrush with improved cleaning and abrasion efficiency
WO1998004167A1 (en) * 1996-07-25 1998-02-05 Whitehill Oral Technologies, Inc. Toothbrush with improved cleaning and abrasion efficiency
USD398154S (en) 1996-12-23 1998-09-15 Colgate-Palmolive Company Toothbrush
US5908038A (en) * 1997-06-16 1999-06-01 Chesebrough-Pond's Usa Co. Unitarily molded toothbrush
US5926900A (en) * 1997-06-16 1999-07-27 Chesebrough-Pond's Usa Co. Unitarily molded toothbrush
WO1998057570A1 (en) 1997-06-16 1998-12-23 Unilever N.V. Unitarily molded toothbrush
WO1998057569A1 (en) 1997-06-16 1998-12-23 Unilever N.V. Unitarily molded toothbrush
US6138315A (en) * 1998-01-13 2000-10-31 Chesebrough-Pond's Usa Co., Divison Of Conopco, Inc. Antimicrobial active compounds
US20060242778A1 (en) * 1999-06-14 2006-11-02 Solanki Sanjay A Toothbrush
US7707676B2 (en) 1999-06-14 2010-05-04 The Procter & Gamble Company Toothbrush
USRE44819E1 (en) 2000-03-16 2014-04-01 Procter & Gamble Business Services Canada Company Toothbrush
US20030167582A1 (en) * 2002-03-07 2003-09-11 Ultradent Products, Inc. Powered tongue cleaning device
US6895624B2 (en) 2002-03-07 2005-05-24 Ultradent Products, Inc. Powered tongue cleaning device
US20050172435A1 (en) * 2002-04-24 2005-08-11 Michele Bernini Tooth-cleaning device
US7895695B2 (en) * 2002-04-24 2011-03-01 S K G Italia S.P.A. Tooth-cleaning device
US8695149B2 (en) 2003-02-11 2014-04-15 Braun Gmbh Toothbrushes
US7958589B2 (en) 2003-02-11 2011-06-14 The Gillette Company Toothbrushes
US20090282628A1 (en) * 2003-02-11 2009-11-19 The Gillette Company Toothbrushes
US7934284B2 (en) 2003-02-11 2011-05-03 Braun Gmbh Toothbrushes
US20070251040A1 (en) * 2003-03-14 2007-11-01 The Procter & Gamble Company Toothbrush head
US9220335B2 (en) 2003-03-14 2015-12-29 The Gillette Company Toothbrush head
US8528148B2 (en) 2003-03-14 2013-09-10 The Gillette Company Toothbrush head
US7975344B2 (en) 2003-03-14 2011-07-12 The Gillette Company Toothbrush head
US20090172900A1 (en) * 2003-03-14 2009-07-09 Brown Jr William R Toothbrush
US8584299B2 (en) 2003-04-23 2013-11-19 The Procter & Gamble Company Electric toothbrushes
US8955186B2 (en) 2003-04-23 2015-02-17 The Procter & Gamble Company Electric toothbrushes
US20050000043A1 (en) * 2003-04-23 2005-01-06 The Procter & Gamble Company Electric toothbrushes
US20050060822A1 (en) * 2003-09-19 2005-03-24 Chenvainu Alexander T. Toothbrushes
US9204949B2 (en) 2003-09-19 2015-12-08 The Gillettte Company Toothbrushes
US7941886B2 (en) 2003-09-19 2011-05-17 Braun Gmbh Toothbrushes
US8621698B2 (en) 2003-09-19 2014-01-07 Braun Gmbh Toothbrushes
US20110179595A1 (en) * 2003-09-19 2011-07-28 Chenvainu Alexander T Toothbrushes
US20100162499A1 (en) * 2004-04-23 2010-07-01 Braun Phillip M Vibrating Toothbrush
US8332982B2 (en) 2004-04-23 2012-12-18 The Gillette Company Vibrating toothbrush
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Also Published As

Publication number Publication date
DE1532799A1 (de) 1969-07-24
DE1532799B2 (de) 1977-01-27
GB1083369A (en) 1967-09-13
CH445444A (de) 1967-10-31
SE310646B (enrdf_load_stackoverflow) 1969-05-12
NO117072B (enrdf_load_stackoverflow) 1969-06-30
FI42821B (enrdf_load_stackoverflow) 1970-08-03
BE671636A (enrdf_load_stackoverflow) 1966-02-14
AT283581B (de) 1970-08-10
NL6514044A (enrdf_load_stackoverflow) 1966-05-02

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