CHOW; DAVID G. L (Total 19 Patents Found)

The present invention relates to a photometric device for measuring optical parameters. The invention functions in the ultraviolet light range through use of a monochromator and splits the test light in multiple channels by a rotor assembly, including a mirror....
The present invention relates to a photometric device for measuring optical parameters. The invention functions in the ultraviolet light range through use of a monochromator and splits the test light in multiple channels by a rotor assembly, including a mirror....
A method of manufacturing a drill bit or other drilling-related structure used for drilling into subterranean formations is herein disclosed where a blank is formed by placing a ferrous metal powder such as steel into a mold, sintering the ferrous metal powder to form a preformed blank, packing an abrasion- and erosion...
A method of manufacturing a drill bit or other drilling-related structure used for drilling into subterranean formations is herein disclosed where a blank is formed by placing a ferrous metal powder such as steel into a mold, sintering the ferrous metal powder to form a preformed blank, packing an abrasion- and erosion...
The present invention relates to a photometric device for measuring optical parameters. The invention functions in the ultraviolet light range through use of a monochromator and splits the test light in multiple channels by a rotor assembly, including a mirror....
L'invention concerne un procédé permettant de fabriquer un trépan de forage ou une autre structure de forage, utilisés pour forer des formations souterraines. Selon le procédé, on forme une ébauche en mettant dans un moule une poudre de métal ferreux tel que de l'acier, on fritte la poudre de métal fer...
The present invention relates to a photometric device for measuring optical parameters. The invention functions in the ultraviolet light range through use of a monochromator and splits the test light in multiple channels by a rotor assembly, including a mirror....
The present invention relates to a photometric device for measuring optical parameters. The invention functions in the ultraviolet light range through use of a monochromator and splits the test light in multiple channels by a rotor assembly, including a mirror....
A method of manufacturing a drill bit or other drilling-related structure used for drilling into subterranean formations is herein disclosed where a blank is formed by placing a ferrous metal powder such as steel into a mold, sintering the ferrous metal powder to form a preformed blank, packing an abrasion- and erosion...
The present invention relates to a photometric device for measuring optical parameters. The invention functions in the ultraviolet light range through use of a monochromator and splits the test light in multiple channels by a rotor assembly, including a mirror....
A method of manufacturing a drill bit or other drilling-related structure used for drilling into subterranean formations is herein disclosed where a blank is formed by placing a ferrous metal powder such as steel into a mold, sintering the ferrous metal powder to form a preformed blank, packing an abrasion- and erosion...