Jim Cramer: Research In Motion, Motorola, Nokia, Sirona Dental

Research In Motion Ltd., maker of the Blackberry wireless e-mail device, is worth buying as a short-term trade because the stock will rise on better-than-expected earnings to be released June 29, Jim Cramer said on his ``Mad Money'' television program on CNBC.

Research In Motion will also be temporarily boosted when Verizon Communications Inc. begins selling the new Blackberry 8700, said Cramer, a market commentator and former hedge-fund manager, who added that the stock should be sold after a few months.

Motorola Inc., the world's second-largest mobile phone maker, may rise on demand for its ``Q'' product, which competes with Blackberry, Cramer said. Nokia Oyj, the world's largest mobile-phone maker, is also worth buying.

Viasys Healthcare Inc., Sirona Dental Systems Inc. and Vital Signs Inc. are worth buying because they are medical-equipment companies that may be soon acquired by conglomerates, Cramer said. Siemens AG, General Electric Co. and Royal Dutch Shell Plc have each recently acquired medical-equipment companies, said Cramer.

Viasys, which makes respiratory and neurological devices, has a lower stock price-to-revenue ratio than its competitors while Sirona Dental's acquisition of Schick Technologies Inc. was ``a great merger,'' Cramer said.

Vital Signs, a maker of face masks and other disposable medical products, is profitable and has a high cash balance, said Cramer.

Johnson & Johnson is worth buying in favor of Abiomed Inc. while Inco Ltd. should be sold in favor of Alcan Inc., he said.

Cramer recommended Helmerich & Payne Inc., Openwave Systems Inc., Cemex SA, Agilent Technologies Inc., Citigroup Inc., Bank of America Corp., Talisman Energy Inc., Rite Aid Corp., Chesapeake Energy Corp., Qualcomm Inc., Texas Instruments Inc., Microchip Technology Inc., Circuit City Stores Inc., Hilton Hotels Corp., Marriott International Inc., Four Seasons Hotels Inc., KB Home, ConocoPhillips, Chevron Corp. and Trinity Industries Inc. in response to questions during the show's ``Lightning Round'' segment.

He also told viewers to avoid Eagle Materials Inc., U.S. Bancorp, Ford Motor Co., Taiwan Semiconductor Manufacturing Co., Silicon Image Inc., Morgans Hotel Group, Toll Brothers Inc., Alliance Resource Partners LP, American Railcar Industries Inc. and Frontline Ltd.

Cramer also said investors should buy Deutsche Telekom AG, Lowe's Cos., Nektar Therapeutics, Hain Celestial Group Inc., Whole Foods Market Inc. and Aeropostale Inc.

Cincinnati Bell Inc. and Quantum Corp. should be avoided, he said.

Cramer said he owns Qualcomm for his charitable trust.

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