Abstract: An example putter presented herein is designed manufactured in a way that allows for a golfer to adjust weight balance of the golf club head by moving respective weights through a toe-side track and a heel-side track on a bottom side of the golf club head. The putter may also be configured with adjustable toe-hang, face material, and loft all in one club, in order to optimize the club for the day's game without having to purchase a new golf club each time one desires to try something new. The putter head can combine a removable, stackable face plate with a continuous range of shaft attachment points to allow a golfer to adjust each factor all in one club.

Abstract: Several interrelated methods are described for guaranteeing the authenticity of a fuel cartridge that will supply methanol, hydrogen, or other fuel to a fuel consuming device apparatus. Specific fuel consuming device constructions must mate with specially designed fuel cartridges to ensure that the fuel will flow properly, that the fuel supplied is of sufficient quality and composition as required, and that will be leak-proof during storage, transport, and use. Several designs that will meet all of these requirements are described below. Each of the fuel cartridge designs will result in an acceptance by the fuel consuming device if the authentication criteria are met and rejection of the cartridge if they are violated.

Abstract: Fuel receptacles and related systems are described that are tamper resistant. A fuel receptacle can include a housing having an opening through which fuel contained therein may be delivered to a fuel consuming device along a fuel path and a biased element. The biased element can be contained with the housing having an orifice and a notch and it can sealing the opening when biased into a first position. The fuel consuming device can contain a protruding member to contact the notch and cause the biased element to move along a plane perpendicular to the fuel path into a second position when the fuel receptacle is coupled to the fuel consuming device. The second position can cause the orifice to be aligned with the opening thereby permitting fuel to be delivered to the fuel consuming device along the fuel path.