Keisei Electric Railway has a total of 43 patents globally, out of which 41 have been granted. Of these 43 patents, more than 83% patents are active. The United States of America is where Keisei Electric Railway has filed the maximum number of patents, followed by Japan. Parallelly, the United States of America seems to be the main focused R&D centre and also Japan is the origin country of Keisei Electric Railway.
Keisei Electric Railway was founded in 1909. Keisei Electric Railway provides passenger rail and bus transportation services in the Metropolitan Tokyo and Chiba prefecture areas. The business also manages real estate, sells, leases, and maintains it. It runs department and grocery shops, hotels, travel agencies, movie theatres, and restaurants. As of March 2023, the market cap of Keisei Electric Railway is $5.9 Billion.
Do read about some of the most popular patents of Keisei Electric Railway which have been covered by us in this article and also you can find Keisei Electric Railway patents information, the worldwide patent filing activity and its patent filing trend over the years, and many other stats over Keisei Electric Railway patent portfolio.
How many patents does Keisei Electric Railway have?
Keisei Electric Railway has a total of 43 patents globally. These patents belong to 43 unique patent families. Out of 43 patents, 36 patents are active.
How Many Patents did Keisei Electric Railway File Every Year?
Are you wondering why there is a drop in patent filing for the last two years? It is because a patent application can take up to 18 months to get published. Certainly, it doesn’t suggest a decrease in the patent filing.
| Year of Patents Filing or Grant | Keisei Electric Railway Applications Filed | Keisei Electric Railway Patents Granted |
| 2015 | – | 3 |
| 2014 | – | 3 |
| 2013 | 6 | – |
| 2012 | 1 | 2 |
| 2011 | – | 2 |
| 2010 | 2 | 1 |
| 2008 | 2 | 7 |
| 2007 | 4 | 5 |
| 2006 | 6 | 11 |
How many Keisei Electric Railway patents are Alive/Dead?
Worldwide Patents
How Many Patents did Keisei Electric Railway File in Different Countries?
Countries in which Keisei Electric Railway Filed Patents
| Country | Patent |
| United States of America | 38 |
| Japan | 5 |
Where are Research Centers of Keisei Electric Railway Patents Located?
10 Best Keisei Electric Railway Patents
US20060121477A1 is the most popular patent in the Keisei Electric Railway portfolio. It has received 10 citations so far from company like Sysmex.
Below is the list of 10 most cited patents of Keisei Electric Railway:
| Publication Number | Citation Count |
| US20060121477A1 | 10 |
| JP2014163143A | 5 |
| USPP25240P2 | 3 |
| USPP16358P3 | 3 |
| USPP18089P2 | 2 |
| USPP17681P2 | 2 |
| USPP16786P2 | 2 |
| USPP16468P3 | 2 |
| USPP16803P2 | 1 |
| USPP16804P2 | 1 |
List of Keisei Electric Railway patents
| Keisei Electric Railway Patents | Title |
| USPP25324P2 | Antirrhinum Plant Named ‘Keianpinetum’ |
| USPP25240P2 | Petunia Plant Named ‘Keisurflipinas’ |
| USPP25147P2 | Petunia Plant Named ‘Keisurfputem’ |
| USPP25122P2 | Petunia Plant Named `Keisurfbripitos` |
| USPP24453P2 | Petunia Plant Named Sunsurfsirou |
| USPP22839P2 | Petunia Plant Named `Keisurfhopises` |
| USPP22838P2 | Petunia Plant Named `Keisurfpusos` |
| USPP21199P3 | Rose Plant Named `Keishisutoki` |
| USPP19509P3 | Hybrid Tea Rose Plant Named ‘Keihaburu’ |
| USPP19088P2 | Antirrhinum Plant Named `Keianichigorum` |
| USPP19091P2 | Antirrhinum Plant Named `Keianmomorom` |
| USPP19084P2 | Antirrhinum Plant Named `Keiananzurem` |
| USPP19087P2 | Antirrhinum Plant Named `Keianmilkwam` |
| USPP18624P2 | Petunia Plant Named ‘Sunsurfmomo’ |
| USPP18616P2 | Petunia Plant Named `Sunsurfpafure` |
| USPP18323P3 | Petunia Plant Named `Keipunes` |
| USPP18089P2 | Petunia Plant Named `Keiwhihus` |
| USPP17735P2 | Petunia Plant Named ‘Sunsurfbv’ |
| USPP17681P2 | Petunia Plant Named `Sunhore` |
| USPP17645P2 | Petunia Plant Named `Sunsurfgigabu` |
| USPP16810P2 | Petunia Plant Named ‘Keipamiphihas’ |
| USPP16803P2 | Petunia Plant Named `Sunremi` |
| USPP16805P2 | Petunia Plant Named `Sunsurfbupa` |
| USPP16804P2 | Petunia Plant Named `Keiametsum` |
| USPP16785P2 | Petunia Plant Named `Keipawhihis` |
| USPP16786P2 | Petunia Plant Named ‘Sunsurflala’ |
| USPP16682P2 | Petunia Plant Named `Sunsurfpapu` |
| US20060121477A1 | Method For Detection Of Micro-Metastasis |
| USPP16468P3 | Petunia Plant Named `Sunrovein` |
| USPP16358P3 | Petunia Plant Named `Sunpurple` |
| USPP16355P3 | Petunia Plant Named `Suncopablue` |
| USPP16297P3 | Petunia Plant Named `Sunpatiki` |
| USPP15756P3 | Petunia Plant Named ‘Sunpatire’ |
| USPP14748P2 | Petunia Plant Named Keipabukas |
| USPP14136P3 | Petunia Plant Named “Keireom’ |
| USPP13968P3 | Petunia Plant Named `Keiyeul` |
| USPP13850P3 | Petunia Plant Named `Keidopuel` |
| USPP13542P2 | Petunia Plant Named `Keilavbu` |
| JP5762513B2 | Taxi Assistance Devices And Taxi Assistance Programs |
| JP2014163143A | Curve Part Track Structure And Ballast Reshaping Material |
| JP4813348B2 | Back Filling Method For Buried Pipe |
| JP4808225B2 | Insulating Blocks, Transport Systems, Jack-Up Systems |
| JP3609401B2 | Plant Unit, Plant Storage Method In The Plant Unit |