Tabata Co., Ltd.

Nitto Boseki Co., Ltd.

Mitsubishi Denki Kabushiki Kaisha

Nikkiso Company Limited

Osaka Prefecture University Public Corporation

Other

Seiko Epson Corporation

Yokogawa Electric Corporation

Minoru Takeuchi

Kenji Kawana

Haruo Kawashima

Mitsumasa Hashimoto

Kiyohiko Takemoto

Naoki Okamoto

Yuji Kuroda

Shuichi Kataoka

Masaru Bunya

Kazuo Kondo

Hiroshi Shimizu

Kazuo Hayashi

Hiromasa Sato

Kazuo Nagata

Koji Akiyama

Satoshi Yoshitake

Kenji Kubo

Ikuo Hayashi

Shinichi Hirose

Seishiro Urabe

Tetsu Tashiro

Yoshiyuki Ishimaru

Yasuhito Nakata

Tadashi Kato

Toshio Sekiguchi

Yusuke Fukushima

Tadao Endo

Kiyoshi Takai

Masaji Fujiwara

Shoji Fujiwara

Kazuo Sakakibara

Yasuhiro Fujita

Yoshiharu Takizawa

Takeyasu Saito

Mitsunori Shimada

Hideyuki Kuri

There is provided a method of well filling copper in a conductivity-rendered non-through hole having an aspect ratio (depth/hole diameter) of 5 or more on a substrate in a short period of time, and the method comprises using an acidic copper plating bath comprising a water-soluble copper salt, sulfuric acid, chlorine ion, a brightener and a copolymer of diallylamines and sulfur dioxide and filling copper in the non-through hole by periodic current reversal copper plating.

Copper filling-up method

Provided is a process for producing a copolymer of diallyldialkylammonium salt and a maleic acid which copolymer is free of residual monomers and polymerization initiator and hence stably exhibits excellent performances in various uses, and the process comprises polymerizing a monomer mixture comprising diallyldialkylammonium salt and maleic acid in the presence of persulfate as a radical polymerization initiator in water or a polar solvent, and completion of the polymerization-reaction, decomposing the radical polymerization initiator to produce a copolymer comprising diallyldialkylammonium salt constituent unit and a maleic acid constituent unit.

Method for producing diallyldialkylammonium salt/maleic acid copolymer

A method of filling copper in a non-through hole on a substrate that has been treated to render it conductive, which comprises plating said substrate in an acidic copper plating bath comprising a water-soluble copper salt, sulfuric acid and a filling additive that is a polymer having the activities of both of a brightener and a leveler.

Disclosed is a liquid composition that, while maintaining good color developing properties and gloss, can realize good cleaning operation without staying of the liquid composition in a cleaning cap. The liquid composition is adapted for use with an ink composition for deposition on a recording medium and comprises a modified polyallylamine, a water soluble organic solvent, and water and is free from any colorant. The liquid composition and an ink composition each are deposited onto a recording medium to perform recording. A polymer comprising a recurring unit represented by formula (I) is used as the modified polyallylamine. 

Liquid composition

The present invention relates to a polyallylamine-based high-molecular-weight polymer which is easily soluble in water and in an organic solvent and gives an excellently stable aqueous solution or organic solvent solution thereof which is suitable for use in the fields of fine chemicals such as the field of inkjet recording, and the polymer is a modified polyallylamine obtained by modifying a copolymer of N,N-dialkylallylamine and allylamine.

Modified polyallylamine and process for producing the same

A strap for diving face mask includes an upper branched sub-section and a lower branched sub-section forming together a loop section in a middle zone of the strap as viewed lengthwise. The upper branched sub-section has a circumferential length larger than a circumferential length of the lower branched sub-section and preferably right and left halves of the strap are sloped toward the side of the lower branched sub-section.

Strap for diving face mask

A cylinder band for immobilizing an air cylinder on a buoyancy regulator includes a belt, a buckle and a coupler adapted to couple the belt and buckle. The buckle has a pair of parallel supporting walls, which have longitudinally opposite first ends and second ends. A pivot extends through the first ends, with end surfaces thereof defining cam surfaces that enhance a tensity of the belt as the second ends swing around the pivot while the end surfaces are in contact with the peripheral surface. The end surfaces each has a pair of convexly curved surface segments spaced from each other in the circumferential direction of the peripheral surface, which are adapted to contact the peripheral surface at once. A concavely curved surface segment extends between the convexly curved surface segments and has a curvature radius which is the same as or less than a radius of the peripheral surface.

Cylinder band for buoyancy regulator

Process for the production of low-molecular-weight allylamine polymer or addition salt thereof

A buoyancy compensating jacket is provided on a waist portion with a pocket having a first flap, a pouch having a flat cord adapted to be inserted into and taken out from the pocket with a weight packed into the pouch. As a guide means for the flat cord, at least one of a substantially C-shaped guide ring provided at a distal end of the first flap substantially in the vertically middle and a groove formed on an outer surface of the pocket and/or an inner surface of the first flap substantially in the vertically middle.

Buoyancy compensating jacket

A diving jacket includes a back-plate shoulder belts and a waist belt The waist belt includes a pair of belt members each having a circumferentially rear end region is fixed to an associated connector plate made of a material harder than the belt and disposed between the rear end region and the back-plate A lower end region of the shoulder bent also is fixed to the associated connector plate

Diving jacket

An A/D converter has a successive approximation register having a plurality of A/D registers each corresponding to one of A/D inputs. A capacitor in a comparator is charged by a voltage determined based on a value held in an A/D register corresponding to an A/D input to be A/D converted before starting A/D conversion of the A/D input, thereby reducing noise generated at the time of selecting A/D inputs to enhance A/D conversion accuracy.

A/D converter

A diving jacket having a strap extending from one of paired shoulder regions to the other of the shoulder regions via an upper end of the jacket . The strap has its opposite ends fixed to the shoulder regions and the length of the strap is adjustable in at least one of the shoulder regions

A diving jacket includes a back-plate and a pair of waist belt members respectively having circumferentially rear end regions fixed to the back-plate by a means of associated connector plates . Rear end regions of the respective connector plates are formed with a plurality of dovetail tenons or a plurality of dovetail grooves arranged in vertical direction of the connector plates so as to extend in parallel one to another and the back-plate is formed with much more dovetail grooves or dovetail tenons than those formed in the connector plates so as to be operatively associated with the dovetail tenons or dovetail grooves of the connector plates , respectively.

A diving snorkel provided in the proximity of at least one of an upper opening and a mouthpiece with at least one partition extending from an inner wall of a snorkel conduit and also extending longitudinally of the conduit so as to compartmentalize the conduit in its circumferential direction, and thereby enable undesirable inflow of water to be obstructed as effectively as possible and enable efficient purging of water which enters into the snorkel.

Diving snorkel

A swimming fin includes a blade and a foot pocket, the blade including a relatively long first blade and a short second blade. The second blade underlies a bottom surface of the first blade and has transversely opposite side edge regions longitudinally extending inside transversely opposite side edges of the first blade and an intermediate region extending between the side edge regions and having its front end curved toward the foot pocket. The swimming fin thus formed can strengthen a thrust obtained by down-kicking movement of the swimming fin to thereby facilitate the up-kicking movement of the swimming fin.

Swimming fin

Growing community of inventors

Tokyo, Japan

Minoru Takeuchi