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in creator/contributor: "Serdinko, John"  
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Telephone.

Description: Patent for a simple and effective magneto telephone with a newly designed apparatus that allows the telephone to better receive and transmit calls and "will receive its magnetism from the magnets of the magneto call" (lines 21-22).
Date: November 13, 1894
Creator: Serdinko, John
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Telephone.

Description: Patent for "a single and effectual magneto telephone bot in receiving and transmitting and improving on [the inventor's] Patent No. 529,203" (lines 14-17).
Date: April 2, 1895
Creator: Serdinko, John
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Rotary Force Pump.

Description: Patent for a new and improved rotary force-pump. This design "consists in a rotary force-pump constructed with a tubular standard provided with one or more flexible tubes having interior half-tubes and an interior cylinder mounted upon a crank-shaft and provided with adjustable bars carrying rollers whereby a liquid can be raised by the successive action of the said rollers upon the said flexible tubes" (lines 22-29).
Date: April 14, 1885
Creator: Serdinko, John
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Portable Dark Room.

Description: Patent for a new and improved portable dark room. This design "consists in a box provided with an opening in one side and a sleeve of pliable material extending outward from this opening, which box contains two smaller boxes for receiving the exposed and unexposed dry plates. The box is provided with a handle for carrying it" (lines 13-19).
Date: February 28, 1882
Creator: Serdinko, John
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Automatic Telephone-Exchange System.

Description: Patent for "a simple system and arrangement which is especially adapted for a telephone exchange, which enables the instruments to be connected by a single wire, which dispenses with the use of an operator at the central station, which has automatic means for registering the messages sent by each subscriber, and which is provided with an automatic switching device by means of which one subscriber may connect with any other" (lines 10-19).
Date: December 5, 1893
Creator: Serdinko, John
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Wind Engine.

Description: Patent for a new and improved wind engine. This design "relates to an improvement in wind-engines, in which a vertical circular frame having a wind-wheel is covered to the half by a hemispherical roof supported by posts" (lines 8-12).
Date: February 2, 1886
Creator: Serdinko, John
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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