Abstract: The twin-wheel motorcar has twin wheels with single side wheels driving capabilities. Twin-Wheel Motorcar has sliding doors, top cover, emergency parking pad, single arm differential height steering shock-tube mechanism and in-hub non-divided axle friction-free non-contact force differential speed driving mechanism.

Abstract: A water gun system comprises a water gun, firing sound emulator, launching tube and rocket type water grenade. Converting the air pressure to be the momentum, the water gun generates the chain shot made of the air and fluid and the firing sound emulator generates the click sound of machine gun. Converting the air pressure to be momentum, the launching tube fires rocket type water grenade. Hitting on the target, the rocket type water grenade sprays fluid on the enemy.

Abstract: The windsurf board comprise a revolving sail, reciprocating fins and single sided pedal. The revolving sail rotates a drum to drive the reciprocating fin. On the drum, there are multiple cycles of slot knotched on the drum. One revolution of revolving sail will induce multiple flip-flop reciprocating motion of the reciprocating fin. The single sided-pedal uses the reciprocating motion to drive the reciprocating fins to propagate forward.

Abstract: The figure-blade roller skake costitutes the steering cushion mechanism. Due to the steering cushion mechanism, as the roller blade skate tilts, the wheels are aligned on an curved track. Shifting the body weight right, the steering cushion mechanism will cause the rollers to curve to the right; shifting the body weight left, the steering cushion mechanism will cause the rollers to the curve to the left. The brake wheel uses the clamping force to brake the skate to stop. The brake wheel can serve as both wheel and brake.

Abstract: The in-line roller blade can skate forward, backward, sideward, turn right, turn left and spin to serve as a figure skate. The in-line roller blade figure skate and skateboard comprise a composite belt enwraping around the wheels. The composite belt comprises the resilient belt, string and beads. The self-propelling mechanism can rotate the wheel that the rider can skate without pushing against the ground. These two techniques can be applied to the ice skate to have the sideward skating capability.

Abstract: The analog dynamic superbuffer comprises the level shift stage, voltage clamping stage and the dynamic buffer stage. The clamping circuit enables the output buffer having the dynamic driving capability to drive a very large output load with very little static DC bias power consumption.The TTL power supply is constituted of the stages of TTL power level shift and the analog superbuffer. The huge impact of the power source load is completely blocked by the analog superbuffer.

Abstract: The BiMOS devices are compact 3D devices having a coupled bipolar and MOS mechanisms integrated in one single cell. The gates cover over the bipolar regions. The bipolar regions are the tubs of the MOS mechanisms. The MOS mechanisms make the connection between the base, emitter and collector to charge and discharge the base voltage. The input applies on the gate to switch on/off the base current of the bipolar mechanism. There are P-PNP, N-NPN, N-PNP, P-NPN, PN-PNP, PN-NPN, NP-PNP and NP-NPN BiMOS devices. The BiMOS inverter, NOR, NAND logic gates are the single stage circuit having the same circuit configuration as CMOS circuits. They are made of P-PNP, N-NPN, NP-PNP and NP-NPN BiMOS devices. The digital BiMOS buffer, OR, AND logic gates are the single stage circuits made of N-PNP, P-NPN, PN-PNP and PN-NPN BiMOS devices. Furthermore, the BiMOS technologies are applied to SRAM, EPROM and EEPROM to generate the BiMOS SRAM, BiMOS EPROM and BiMOS EEPROM memory devices.

Abstract: Surf board has multiple functions to serve as the sail boat, surf board, wind surf board, canoe and the rest seat on water. It comprises a foldable revolving sail, water wings, single sided pedals, water turbine, water jet nozzle, the foldable reclining seat and board with removable canoe cover. The revolving sail drives the horizontal water turbine to generate the water jet. The water jet may swivel to propel the surf board in different direction. The revolving sail also serves as the sunshade umbrella. The foldable revolving sail adopts the flexible parafoil sail. If the wind is weak, the rider steps on the single sided pedals to rotate the water turbine to propel the board. Furthermore, the revolving sail and water wings lift the board to glide in the air and land softly.

Abstract: A drink cap comprising sliding/rotating straw/spout with or without the coolant and/or ice cube houses. There is a conduit inside the sliding/rotating straw/spout to guide the beverage to flow out. The drinker sips the beverage out of the can or bottle through the sliding/rotating straw/spout. The coolant/ice cube houses keep the drink at low temperature for hours.A drink can comprising sliding/rotating straw/spout and can. The drinker sips the beverage out of the can or bottle through the sliding/rotating straw/spout. The can is vacumn sealed with knotched panel. As the sliding spout is pushed or the rotating straw is pulled, the knotched panel is pushed to open an orifice and the drink may flow out. The drinker sips the drink directly through the sliding/rotating straw/spout. As the sliding spout or rotating straw is pushed to close, the beverage is sealed to preserve the aeration and fragrance.