Kabushiki Kaisha Riken

Japan


 
Total IP 274
Total IP Rank # 4,689
IP Activity Score 2.9/5.0    135
IP Activity Rank # 5,080
Dominant Nice Class Machines and machine tools

Patents

Trademarks

61 11
0 5
188 9
0
 
Last Patent 2024 - Piston ring and booster pump
First Patent 1980 - Apparatus for grinding finish of...
Last Trademark 2023 - NPR-RIKEN
First Trademark 1977 - RIKEN

Industry (Nice Classification)

Latest Inventions, Goods, Services

2024 Invention Aromatic polyether ketone molded body and production method therefor. This aromatic polyether ket...
Invention Aromatic polyether ketone molded body and method for producing same. This aromatic polyether keto...
Invention Laminated core, noise filter, magnetic core. ave4ave4444 to S is no more than 10.0%. This noise f...
2023 Invention Wave generator for strain wave gear device and strain wave gear device. The present invention pro...
Invention Radio wave absorbing sheet. 4H6H4H6H6H derived from 6H-SiC and appearing at 2θ = 35–36°, is equal...
G/S Non-metallic minerals, namely, sulfur; ceramic compositions for sintering namely, ceramic granule...
G/S Non-metallic minerals; ceramic compositions for sintering [granules and powders]. Dental materia...
Invention Magnetic core and noise filter. A magnetic core (1) comprises a plurality of magnetic laminated p...
Invention Planetary roller-type power transmission device. The present invention is a planetary roller-type...
Invention Planetary roller-type power transmission device. This planetary roller-type power transmission de...
Invention Planetary-roller-type motive power transmission device. A planetary-roller-type motive power tran...
Invention Aromatic polyether ketone molded body and production method therefor. [Problem] To provide a tech...
Invention Sliding mechanism. [Problem] To reduce the amount of wear of a lip ring having PTFE as a main com...
Invention Piston ring set. A piston ring set according to one aspect comprises a top ring and an oil ring, ...
Invention Sliding mechanism. This sliding mechanism is a sliding mechanism between a piston and a cylinder ...
Invention Piston ring and piston ring combination. This piston ring is to be mounted on the piston of an in...
Invention Molded resin object and sliding member. [Problem] To improve the performance of a molded resin ob...
Invention Electronic apparatus case. [Problem] To provide a technology by which an electronic apparatus cas...
2022 Invention Oil control ring. An oil control ring comprising: an annular main body portion having an inner ci...
Invention Piston ring and piston ring set. This piston ring is provided with an annular body having: an inn...
Invention Motor system. This motor system inverter-controls a motor (2). The motor system comprises: a stat...
Invention Bearing. A bearing (B1) includes a plurality of rolling elements (6) and a cage (7) for holding t...
Invention Wave generator for wave gearing, and wave gearing. A wave generator (4) for a wave gearing 1 comp...
Invention Sliding member. A sliding member according to the present invention is used in the presence of a ...
Invention Roller-type rocker arm. A roller-type rocker arm (10) comprises: a body (11) including a pair of ...
Invention Annular magnetic body for noise control and member for noise control. The present invention provi...
Invention Piston ring and booster pump. Provided is a piston ring including: a low-pressure side ring; and...
Invention Piston ring and booster pump. Provided is a piston ring (20) comprising a low-pressure-side ring ...
Invention Strain wave gear device. A strain wave gear device (1) has internal gear teeth (2), flexible exte...
Invention Side rail and oil control ring comprising same. h0≤1.1  Condition 1: In the expression, R1 repr...
Invention Side rail and oil control ring comprising same. This side rail constitutes an oil control ring to...
G/S Piston rings; piston rings being engine parts; machine parts of non-electric prime movers, namely...
G/S Piston rings; piston rings being engine parts; parts of non-electric prime movers; power transmi...
Invention Case. [Problem] To provide a feature which which it is possible to achieve both heat dissipation ...
Invention Valve seat made of iron-based sintered alloy. Provided is a valve seat that is made of an iron-ba...
2021 Invention Piston ring and method for manufacturing same. (B) a step of applying a bias voltage in an enviro...
Invention Piston ring and manufacturing method therefor. A piston ring manufacturing method according to th...
Invention Film, and piston ring. This film comprises Cr, Ti, Si, and N, wherein the Ti is contained in an a...
Invention Strain wave gear device. R.
Invention Strain wave gear device. FFFFRRRRR of teeth.
Invention Planetary speed reducer. A planetary speed reducer according to the present invention comprises: ...
Invention Planetary reduction gear device. A planetary reduction gear device comprising: a sun gear; an int...
Invention Peek molded body and method of producing the same. [Object] To provide a technology capable of f...
Invention Peek molded body and method for producing same. [Problem] To provide a technology which enables f...
Invention Sintered valve seat. Provided is a sintered valve seat which is press-fitted into the cylinder he...
Invention Piston ring, and method for manufacturing same. A piston ring includes a substrate, and a film co...
2020 Invention Compression ring. where the radius of curvature R1 is that of outer peripheral arcs of gap end p...
Invention Vehicle knuckle. d at the first side of the main body to the strut junction. The first through-ho...
Invention Vehicle knuckle. A vehicle knuckle 1 comprises a body section 10 that supports an axle, a strut-l...
Invention Annular magnetic body for noise control. Provided is an annular magnetic body for noise control, ...
Invention Combination of cylinder and piston ring. The present disclosure is a combination of a cylinder an...
Invention Spheroidal graphite cast iron and method of producing spheroidal graphite cast iron, and vehicle ...
Invention Vehicle knuckle. a) with the main body portion (10). The sidewall portion (120) is free of a thro...
Invention Sliding member. O1 of the width L2 of the groove to the pitch L1 of the groove in the first annul...
2016 G/S Non-electric prime movers, not for land vehicles [other than water mills and wind mills]; parts ...
2015 G/S Seal rings of resin for use in automobiles.
2006 G/S Piston rings for internal combustion engines.
1999 G/S Pipe fittings and parts therefor.
1987 G/S ENGINE PARTS FOR LAND VEHICLES, NAMELY, PISTON RINGS [ AND SEAL RINGS ]
1983 G/S [ Pistons, ] Piston Rings, [ Cylinder Liners and Valve Seats ] for Marine Vehicles
G/S Heat Resistant Stud Bolts and Hook Pins Made of Metal for Use in High Temperature Furnaces Electr...
1982 G/S Pipe fittings and parts.
1981 G/S Engine parts for land vehicles.
1977 G/S [Pistons,] Piston Rings, [Cylinder Liners and Valve Seats] for Land Vehicles
G/S [ Pistons, ] Piston Rings [, CYLINDER LINERS AND VALVE SEATS ] FOR LAND VEHICLES