USFreightways, which is based in Rosemont, Ill., provides what is known as "less than truckload" services, which consolidate several customers' shipments on one truck.
The laptops arrived in two shipments, on Feb. 20 and Feb. 23.
For years, Venezuela has propped up Cuba's limping economy with oil shipments on generous terms.
Gazprom, which is based in Moscow, stopped shipments on Wednesday amid a dispute over prices.
The government has made cargo shipments on passenger planes its first priority.
The company resumed oil shipments on Sunday, loading two tankers at a port in Tobruk, Mr. Bulifa said.
So do about half of all seaborne oil shipments, on which the economies of Japan, China and South Korea depend.
Crude oil is the fastest growing category of hazardous shipments on North American rails because of limited pipeline capacity for booming Bakken production.
The company introduced centralized warehouses, required delivery trucks to have appointments, carry standardized identification cards and deliver shipments on standard-sized pallets.
The Chong Chon Gang, it has emerged, is a known rogue ship, having been stopped and searched with suspicious shipments on several other occasions.
Mr. Chávez has helped prop up the Cuban economy with oil shipments on preferential terms, and he is very close to the Cuban leadership.
