David M Mcgrath

US Patent:

6893358, May 17, 2005

Filed:

Jul 10, 2003

Appl. No.:

10/604312

Inventors:

Pijush K. Dewanjee - Carlsbad CA, US
Herbert Reyes - Laguna Niguel CA, US
Bart R. Fliers - Vista CA, US
David B. McGrath - San Marcos CA, US
Ronald K. Hettinger - Oceanside CA, US
Wayne H. Byrne - Murrieta CA, US
John G. Guard - Oceanside CA, US
Augustin W. Rollinson - Carlsbad CA, US

Assignee:

Callaway Golf Company - Carlsbad CA

International Classification:

A63B053/04

US Classification:

473340, 473342, 473349

Abstract:

A method for manufacturing a golf club head with a thermoplastic polyurethane insert is disclosed herein. The thermoplastic polyurethane insert is disposed in a recess of the club head in which the recess has a depth that is greater than the thickness of the insert. The thermoplastic polyurethane insert has a plurality of tabs on its perimeter to engage the recess walls to allow the insert to essentially float within the recess. An adhesive is disposed between the rear wall of the recess and an interior surface of the insert. Further, an adhesive is applied between the plurality of tabs, and preferably over the exterior surface of each of the plurality of tabs.

US Patent:

47182369, Jan 12, 1988

Filed:

Dec 12, 1985

Appl. No.:

6/808417

Inventors:

Leon Awerbuch - Chevy Chase MD
Victor Van der Mast - Lafayette CA
David P. McGrath - Waterbury CT

Assignee:

Bechtel Power Corporation - San Francisco CA

International Classification:

F03G 704

US Classification:

606415

Abstract:

Improved apparatus and method in which brine of the geothermal and geopressured types is directed into one or more flash-crystallizer-separator units from a geothermal well. Such brine is separated into a gaseous fraction, a liquid fraction and a solids fraction. The gaseous fraction is used to provide useful work, such as driving a turbine, while the liquid and solids fractions are treated to remove the mineral values therefrom. The liquid fraction, following the mineral recovery therefrom, is directed back into the earth through an injection well. An important aspect of the invention is the injection of chemicals into one or more of the process vessels of the apparatus of the present invention. This causes additional mineral growth, such as the growth of heavy metal sulfide, in the brine. This is achieved by injecting sulfide ions into the brine, preferably in the form of sodium sulfide.

US Patent:

20220231669, Jul 21, 2022

Filed:

Jun 25, 2020

Appl. No.:

17/617262

Inventors:

- San Francisco CA, US
David S. MCGRATH - San Francisco CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

H03H 17/02
G10L 19/008

Abstract:

A filterbank, suitable for modifying audio signals with dynamic gains in each band, is constructed so that the perceived latency is small, while a larger group delay is applied at low frequencies to enable higher frequency resolution in the lower frequency bands. The higher group delay at low frequencies is achieved by inserting an all-pass filter into the reconstructed filter response.