Inventor

HIRASAWA HIDEO

JP33 patents

⚠️ This page may combine multiple inventors who share the name “HIRASAWA HIDEO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HIRASAWA HIDEO

SHINETSU CHEMICAL CO

Optical fiber manufacture method including elongating a preform in a vertical direction and a horizontal direction

Straightening a glass rod for use in making an optical fiber preform

Glass base material manufacturing apparatus with super imposed back-and-forth burner movement

Method for drawing a glass ingot

Method for making a preform for optical fibers by drawing a mother ingot

Apparatus and method for making an optical fiber preform using a correction pass

Method of stretching an optical fiber preform with monitoring the diameter at two locations

Optical fiber preform, method for manufacturing thereof, and optical fiber obtained by drawing thereof

Method and apparatus for fusing an optical fiber preform

Method of making an optical fiber preform where a second elongation is based on a mark on a glass rod

Porous optical fiber base materials, optical fiber base materials and methods for producing them

Apparatus and method for drawing a glass ingot

Method of forming a fiber preform to minimize shifts of the zero-dispersion wavelength

Method of lowering and raising a optical fiber preform in a sintering furnace

Preparation of a preform of optical fibers

Apparatus for sintering a porous glass base material and a method therefor

Method for the preparation of a porous silica glass preform for optical fibers

Method of depositing glass soot with controlling reaction chamber humidity to prevent accumulation of excess soot

Glass base material producing device

Glass base material packing method

Optical fiber manufacture method, preform manufacture method, and preform manufacture apparatus

OVD apparatus including air-regulating structure

Method for producing optical fiber base material ingot by grinding while core portion central axis is brought into line with rotational axis of grinding machine

Double flame polishing method for fiber preforms

Apparatus for fabricating soot preform for optical fiber

Apparatus for manufacturing glass base material and a method for manufacturing glass base material

Glass base material drawing apparatus and method for drawing glass base material

Method for pulling-up a porous silica glass preform

Apparatus for preventing redeposition of silica during flame severing

Method of making glass base material

Method for manufacturing glass-base-material by measuring the weight of the material

Apparatus and method for manufacturing glass-base-material

TOBISAKA YUUJI

Glass base material manufacturing apparatus and glass base material manufacturing method