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July, 1922
THE RADIO DEALER
75
ments which produces a new and useful result is patentable."
If in the construction of an improved machine it is necessary to incorporate therein a part or parts which in themselves are covered by an unexpired patent to another, the improved machine — if the improvement amounts to invention — would still be patentable, although not capable of commercialization in view of the fact that it could not be made, sold or used without infringement of the earlier patent if the latter were valid and the invention properly claimed therein. But the disclosures of any expired patent may be utilized, in whole or in part, in the construction of a machine which constitutes a real improvement, and the latter as a whole may be made the subject of a " merchantable " as well as a strong and valid patent.
ENTER RADIO FIELD
The Automotive Specialties Company, of New York, whose products have been known in the automobile accessory field for a number of years under the "Tasco" trade-mark, have recently undertaken the manufacture of a popularly priced crystal receiving set and high quality headset.
All "Tasco" products carry the unreserved guarantee of the Automotive Specialties Company. The receiving set lists at $5.00, while a pair of "Tasco" phones retail at $7.00. The quality of former "Tasco" products in the auto accessory field is doing much to entrench their products firmly in the radio market.
WARRANT LOOSE COUPLER
The Mercury Radio Company, of Orange, New Jersey, guarantee their loose coupler designed especially for radio service by their engineers, after painstaking experimenting.
The particular feature of their loose coupler is that its tuning coil core is made of bakelite, peculiarly adapted to radio needs.
The Company also makes radio sets and the units of the sets, which may be built up as the enthusiast finds his wants and his pocketbook increase.
All Buffalo newspapers have arranged to supply the evening programs of the new radio broadcasting station, WRG, of the Federal Telegraph and Telephone Company, which was opened May 21. The Courier has the Monday night program ; News, Tuesday night ; Times, Wednesday night; Express, Thursday night; Commercial, Friday night, and Enquirer, Saturday night.
The Edmonton Journal, Edmonton, Alberta, is the latest Canadian daily to announce the installation of a radio broadcasting station.
DEALERS ATTENTION
We are ready to market an attractive line of Radio Sets and Accessories. Communicate with us regarding exclusive selling rights for your territory.
Roydart Company Inc.
2 Rector Street New York City
66
SEABOARD" Products
Sturdy Construction
Perfect Insulation
Special Shaft Contact
Adjusted, Tested a 11 d Inspected Before Shipment
23 Plates
Capacity— .0005 mfd.
Dependable Efficient
Guaranteed Low Price
PRICE $3.00
No. 1. Variable Condenser
For Panel Mounting IMMEDIATE DELIVERY
Jobbers and Dealers
SEABOARD RADIO CORPORATION
266 Grand Street, New York City
Wriie for Discounts
TONKS VARIABLE CONDENSERS
Every condenser tested before leaving factory and guaranteed to function properly
Air Type 13 plate— .00025— $3.00 23 plate— .0005— 3.50 43 plate— .001— 4.25
Distributers Write
Insulated Type Ideal for Amateurs 13 plate— .0005— $3.40 25 plate .001— 4.00
Only One Wanted in Each Territory
TONKS MFG. CO.
16-22 BOYDEN PLACE NEWARK, N.J.