Patent landscapes › Office, school & tools
Is a pencil sharpener patented?
Short answer: specific designs of a pencil sharpener have been patented many times, but "a pencil sharpener" as a general idea is not what is protected. What matters is the exact combination of features in your version.
What our index shows
- 152 US and WO patent publications since 2000 have a title matching “pencil sharpen” or a close variant (our index of 9.7 million patent families; one publication per family).
- Among the 152 best keyword matches we examined, 28 were published in 2020 or later, and the earliest was published in 2000.
- Most frequent assignees in those matches: ACME UNITED CORP (4), KUM LTD (3), SDI CORP (3), CARL MFG CO (3).
- Most common patent classes (CPC subclasses): B43L (143), B43K (16), A45D (11), Y10T (6).
Counts come from keyword matching on titles and abstracts, so they are indicative, not a legal count. Some matches are different products that share a word.
14 real patent publications related to a pencil sharpener
- Shaving compression mechanism of pencil sharpener, and pencil sharpener US-2026192592-A1 2026 · Ningbo tiantian stationery co ltd
A shaving compression mechanism of a pencil sharpener, and a pencil sharpener are disclosed. The shaving compression mechanism of the pencil sharpener includes: a conveying member provided in a shaving box, the conveying member be…
View on Google Patents - Pencil sharpener having a guide element for discharging shavings US-2018281505-A1 2018 · LUETTGENS FRITZ
A pencil sharpener (1) having a sharpener body (2), having at least one guide cone (7) situated in the sharpener body (2) for guiding the pencil tip (5) during sharpening, and having a cutting blade (3) fixed to the sharpener body…
View on Google Patents - Reciprocating pencil sharpener US-9969207-B2 2018 · SDI CORP
A reciprocating pencil sharpener has a shavings receptacle, a stationary member, a cutter and a ratchet mechanism. The cutter includes a blade secured to a blade holder. The ratchet mechanism is mounted between the stationary memb…
View on Google Patents - Hand-cranked pencil sharpeners US-8459317-B2 2013 · HU JINGYI
Disclosed is a hand-crank pencil sharpener, comprising a housing and a gearing member and a sharpening member which are installed within the housing. The gearing member is connected to a hand crank and transmits a rotation of the …
View on Google Patents - Pencil sharpener with dual blades WO-2012045271-A1 2012 · TONG GUANGHUI
A pencil sharpener (1) having a frame (10) in which a receiving opening (20) in a shape of cone is defined. Two blades (31, 32) are each installed along one of two opposite generatrices lines of the receiving opening. The pencil s…
View on Google Patents - Pencil sharpener with two blades US-2012233867-A1 2012 · FONG FAT WAI BILL
A pencil sharpener having a support and a main blade adapted to dispose and secure onto the support is disclosed which comprises an auxiliary blade adapted to dispose onto the support and secure thereonto by a screw and a correspo…
View on Google Patents - Shaving tray for pencil sharpener US-2011179654-A1 2011 · ACCO BRANDS USA LLC
A pencil sharpener includes a base containing a sharpening mechanism, and a shaving tray coupled to the base and movable between an installed position and an uninstalled position relative to the base. The shaving tray defines a ch…
View on Google Patents - Pencil sharpener with helical blade WO-2011134116-A1 2011 · WENZHOU COWINS STATIONERY TECHNOLOGY CO LTD
A pencil sharpener with a helical blade is provided. The pencil sharpener comprises a plastic blade holder (1) and a helical blade (2), wherein the plastic blade holder (1) is provided with a tapered pencil sharpening hole (6), a …
View on Google Patents - Cutting blade for pencil sharpener WO-2010048797-A1 2010 · ZHENG CHAOYONG
A cutting blade for a pencil sharpener comprises a blade body (1). The front part (10) of the blade body (1) is equipped with a pen holder cutting portion (3). The rear part (11) of the blade body (1) is equipped with a pen core c…
View on Google Patents - Semi-automatic pencil sharpener US-7389588-B2 2008 · LAU TUNG YAN
The present invention relates to a semi-automatic pencil sharpener comprising a sharpening body and a blade; the sharpening body has a conical bore with a throughslot for allowing shavings to go out; and the blade is disposed outs…
View on Google Patents - Measuring tape and pencil sharpener US-2007289155-A1 2007 · WINEMILLER ALLAN C
A combination measuring tape and pencil sharpener has a removable sharpening unit to provide a convenient field sharpener. A conventional retractable measuring tape is combined with pencil sharpener unit. The removable sharpener u…
View on Google Patents - Pencil sharpener US-7225547-B2 2007 · KUM LTD
A compact sharpener ( 1 ) for a pencil (S), the sharpener being cost-effective to realize and being particularly suitable for sharpening a cosmetic pencil in particular, comprises a sharpener body ( 2 ) and a shaving blade ( 3 ) f…
View on Google Patents - Pencil sharpener for carpenter's pencil US-6571480-B1 2003 · ROYAL INTERNAT CORP
A hand-operable and portable pencil sharpener which is comprised of a housing having a conical cavity therein. The cavity is of circular cross-section and defines an open inlet end tapering to a narrow inner end. A collar is provi…
View on Google Patents - Cosmetic pencil sharpener US-6393705-B1 2002 · CHANG CHARLES
A cosmetic pencil and sharpener comprises a cap and pencil portion having a sharpened head on a first end portion, an elongated body and a second end portion. The cap includes a recess at one end to engage and cover the pencil hea…
View on Google Patents
What this means for your idea
Because patents cover specific combinations of features, the useful question is not “has a pencil sharpener been patented?” but “has my combination of features been described before?” Tools and office products differ in grips, adjustment mechanisms, and how blades or bits are held and changed.
Check your own version of a pencil sharpenerGet the 10 closest patents to your design, charted feature by feature, in 24 hours. Order the $99 report See a sample
Or get the full $99 report: top 10 references charted feature by feature, in 24 hours.
Guides that help with this
First-look landscape. Not exhaustive. Not legal advice. This page lists keyword-matched publications from a limited database; it does not say whether any product is or isn't covered by a patent, whether a patent is still in force, or whether your idea is patentable. Consult a registered patent attorney or agent.